Site Directory & Tool Matrix

1-Bit OLED / E-Paper C-Array & U8g2 Bytecode Converter

Convert icons and logos into ready-to-flash C/C++ byte arrays for Arduino, ESP32, and Raspberry Pi Pico. Supports SSD1306, SH1106, Adafruit GFX, and U8g2 formats.

1-Click Browser Bookmarklet Generator

Install draggable one-click browser bookmarklets for DNS & SSL inspection, text cleaning, JSON formatting, and HTTP header audits right in your bookmarks bar.

3-Axis Camera Gimbal Payload Center of Gravity & Torque Sizer

Client-side interactive engineering calculator for 3-axis camera gimbal payload center of gravity & torque sizer. 100% private in-browser computation with zero server transit.

3-Ring Binder Gutter & Margin Shifter

Shift PDF margins outward to add protective gutters (left/right alternating for duplex) so 3-ring binder hole punches never punch through text.

35mm C-41 Color Film Negative Orange Mask Remover & Inverter

Convert digitizer scans of color film negatives into true-to-life positive photographs. Automatically subtracts the chemical orange/amber polymer mask base without creating murky cyan casts.

3D Geometric Volume Calculator

Calculate 3D volume for standard geometric solids with step-by-step mathematical formulas.

3D Lenticular Flip Interlacer (2-Image Hologram Print Maker)

Interlace two images into alternating vertical micro-stripes calibrated for 40, 50, and 60 LPI plastic lenticular lens sheets to create 3D flip hologram prints at home.

3D Printable Photo-to-Lithophane Relief STL Generator

Convert photos into 3D printable binary .stl lithophanes for Bambu Lab, Creality, and Prusa 3D printers. Dark areas print thick and light areas print thin so the photo magically appears when backlit by a lamp.

3D Printer G-Code Layer & Retraction Travel Path Analyzer

Inspect raw 3D printer .gcode files directly in your browser. Highlights filament retractions, unretractions, and fast non-print travel moves (G0) to diagnose stringing, oozing, and seam defects without heavy desktop slicers.

3D STL Mesh Non-Manifold Hole Closer & Watertight Cap Repairer

Inspect 3D STL triangle meshes, detect open boundary edges and non-manifold holes, and auto-cap missing face triangles client-side to generate verified watertight binary STL files for Cura, PrusaSlicer, or Bambu Studio.

3D Surface Area Calculator

Calculate total surface area for spheres, cylinders, cones, and rectangular boxes.

4×6 Thermal Shipping Label Extractor

Crop and rotate 4×6 shipping labels embedded in 8.5×11 packing slips into direct 4×6 format for thermal printers (Rollo, Zebra, Munbyn).

401(k) Retirement Calculator

Forecast your 401(k) retirement balance, annual employer match contributions, and safe retirement withdrawal income.

50/30/20 Rule Budget & Spending Calculator

Split your monthly take-home salary into 50% Needs (rent, food, bills), 30% Wants (dining, hobbies), and 20% Savings & Debt Payoff.

70% Rule House Flipping & Maximum Offer Calculator

Calculate your Maximum Allowable Offer (MAO) on fix-and-flip properties using the industry standard 70% rule minus estimated repair costs.

8-Bit Retro Chiptune Sound FX & Audio WAV Synthesizer

Procedurally generate authentic 8-bit sound effects (Coin, Laser, Jump, Explosion, Power Up) for Unity, Godot, and retro game development. Synthesizes directly in-browser and exports uncompressed 16-bit WAV audio.

Academic Citation Generator & Bibliography Builder

Generate accurate APA 7th, MLA 9th, Chicago 17th, Harvard, and IEEE citations for websites, books, journals, and videos with live in-text preview and bibliography export

Academic PDF Page Number Re-Indexer (Roman to Arabic)

Calibrate digital PDF reader page numbers so front matter displays Roman (i, ii, iii) and Chapter 1 aligns with Page 1 for thesis submissions.

Add Blank Page

Add a blank page at the beginning, end, or after any specific page in your PDF.

Add Image

Upload an image and place it on any page of your PDF. Resize and position freely.

Add Page Numbers

Add page numbers to your PDF with customizable position, starting number, and font size.

Add Shot on iPhone Watermark Online Free — Pro EXIF Branding | img.ubify

Automatically add professional 'Shot on iPhone' or custom camera watermarks to your photos. Our studio reads EXIF metadata to identify your camera and lens, creating elegant, branding-ready overlays instantly. 100% private.

Add Text

Click anywhere on a page to place a text box. Customize font, size, and color.

Add Watermark to Photo Online — Professional Brand Protection | img.ubify

Protect your creative work with our Premium Watermark Studio. Add text or logo overlays to your images with professional transparency and precision. 100% private.

AES Encrypt & Decrypt

Encrypt and decrypt text using AES

Age Calculator

Calculate exact age from date of birth

Age in Days Calculator

Calculate total days, hours, and astronomical milestones since your birth date

Age in Days Calculator

Find out exactly how many days, hours, heartbeats, and breaths you've been alive — with life milestones, cosmic perspective, and a shareable result card.

AI API Token & LLM Cost Calculator

Calculate and compare API costs for OpenAI GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, and open-source models based on token usage.

AI Background Remover - Remove Background from Image Online Free | img.ubify

Instantly remove background from any image with our AI background remover. Free, high-quality, and automatic. Perfect for e-commerce, portraits, and social media.

AI Content Detector & Perplexity Burstiness Matrix

Analyze text for AI generation markers (ChatGPT, GPT-4, Claude, Gemini) using sentence perplexity variance, burstiness distribution, and vocabulary repetition scoring

AI Face Crop Tool — Biometric Passport Centering Online Free

Instantly crop faces for passport, visa, and professional IDs. AI-powered centering ensures compliance with ICAO standards. 100% private.

AI Image Upscaler — Professional 4K/8K Neural Enlarger | img.ubify

The professional standard for upscaling logos, icons, and 4K wallpapers. Mathematical precision enlargement up to 4x without AI artifacts. Print-ready quality.

AI Metadata & EXIF Scrubber — Secure Privacy Shield | img.ubify

View and strip sensitive EXIF data, GPS locations, and camera info from your photos. Secure your digital identity with one-click metadata scrubbing. 100% private.

AI Object Remover | Remove Unwanted Objects from Photos Online | img.ubify

The professional standard for seamless content editing. Remove people, text, and distractions from your photos instantly with our Magic AI engine. Zero data retention.

AI Photo Restorer — Fix Blurry Photos & Enhance 4K | img.ubify

Breathe life into low-res photos with our AI Neural Reconstructor. Generates missing details, removes noise, and unblurs shots up to 4x. 100% private AI.

AI Prompt Generator

Select your use case and get a fully optimized prompt for ChatGPT, Claude, or any AI model — ready to copy and use instantly.

AI Tool Cost Calculator

Estimate your monthly AI tool costs based on your usage — across ChatGPT, Claude, Midjourney, and other popular services.

Air Conditioner BTU Sizing Calculator

Calculate required air conditioning cooling BTUs for room and whole-house AC units.

Alimony Estimator

Estimate spousal maintenance and alimony payments based on marriage length and income gap

Alimony Estimator

Get a realistic estimate of spousal support payments based on marriage length, income difference, and state — before you hire a lawyer.

Alphabetical Line Sorter

Sort lines of text alphabetically

Alt Tag Checker

Check images for missing alt attributes in HTML

Amazon FBA & 2D Pallet Shipping Label Generator

Generates standard 4×6″ thermal shipping carton labels for Amazon Seller Central FBA shipments. Features compliant Code 128 carton barcodes, 2D inventory matrix, and mandatory Team Lift warning badges.

Amazon KDP Book Cover & Spine Dimension Calculator

Calculate exact KDP spine thickness and full cover PDF dimensions based on page count and paper type to prevent Amazon KDP publishing rejection.

Analog Synthesizer Envelope ADSR Millisecond Time Sizer

Client-side interactive engineering calculator for analog synthesizer envelope adsr millisecond time sizer. 100% private in-browser computation with zero server transit.

Analog Tape Flanging, Phasing & Comb Filter Frequency Sizer

Client-side interactive engineering calculator for analog tape flanging, phasing & comb filter frequency sizer. 100% private in-browser computation with zero server transit.

Anamorphic Cylindrical Mirror Art Un-Distorter

Transforms any photograph into an optical illusion anamorphic warp. The drawing appears wildly stretched on paper, but resolves into a crystal-clear original reflection when a cylindrical mirror is placed in the center.

Anamorphic Oval Bokeh Distortion & Blur Aspect Sizer

Client-side interactive engineering calculator for anamorphic oval bokeh distortion & blur aspect sizer. 100% private in-browser computation with zero server transit.

Annotate PDF

Add highlights, underlines, strikethroughs, and sticky note comments to your PDF.

App Store & Play Store 1024×1024 High-Res Icon Extractor

Download original master uncompressed 1024×1024 and 512×512 PNG app icons directly from Apple App Store and Google Play Store CDNs for mockups and reviews.

Apple .pages & .numbers Document Extractor

Extract internal vector PDF documents and high-resolution QuickLook image previews from Apple .pages, .numbers, and .keynote files on Windows without a Mac.

Appliance Electricity Cost Calculator

Calculate how much household appliances (AC, space heaters, computers, refrigerators) cost to run per month.

Area Converter

Convert between area measurement units

Aspect Ratio & Screen Resolution Scaler Calculator

Calculate proportional dimensions for 16:9 (YouTube), 9:16 (TikTok & Reels), 4:3, 1:1, and 21:9 ultrawide video and image resolutions.

Astrophotography 500 Rule & NPF Sharp Exposure Time Sizer

Client-side interactive engineering calculator for astrophotography 500 rule & npf sharp exposure time sizer. 100% private in-browser computation with zero server transit.

Astrophotography Star Spike & Diffraction Spikes Simulator

Add realistic Newtonian 4-vane, 6-vane, or James Webb Space Telescope (JWST) 8-vane diffraction spikes to telescope and astrophotography images with authentic chromatic rainbow flare dispersion.

Atmospheric Air Refraction Optical Apparent Altitude Sizer

Client-side interactive engineering calculator for atmospheric air refraction optical apparent altitude sizer. 100% private in-browser computation with zero server transit.

Attorney Hourly Fee Split & Retainer Drawdown Balance Sizer

Client-side interactive engineering calculator for attorney hourly fee split & retainer drawdown balance sizer. 100% private in-browser computation with zero server transit.

Audio Cable Balanced XLR vs Unbalanced CMRR Noise Sizer

Client-side interactive engineering calculator for audio cable balanced xlr vs unbalanced cmrr noise sizer. 100% private in-browser computation with zero server transit.

Audio dB SPL Distance Attenuation & Inverse Square Law Sizer

Client-side interactive engineering calculator for audio db spl distance attenuation & inverse square law sizer. 100% private in-browser computation with zero server transit.

Audio Delay Time to Milliseconds & Reverb Pre-Delay Quantizer

Client-side interactive engineering calculator for audio delay time to milliseconds & reverb pre-delay quantizer. 100% private in-browser computation with zero server transit.

Audiobook & Podcast MP3 to Single M4B with Chapter Markers

Merge and package audio lectures and podcasts into standard Apple Books and Audible compatible .m4b audiobooks with embedded chapter markers and playback position memory.

Australia Passport Photo Maker — Official 35x45mm Online Tool | img.ubify

Create Australian passport photos online. Official 3.5x4.5cm size, white background, and biometric compliance. 100% private.

Auto Loan & Monthly Car Payment Calculator

Calculate monthly auto loan payments, sales tax, trade-in equity, total interest, and total vehicle cost across loan terms

Automotive OBD-II DTC Fault Code & Freeze-Frame Interpreter

Decode generic (P0xxx) and manufacturer-specific (P1xxx, C, B, U) OBD-II trouble codes with live freeze-frame fuel trim analysis, symptoms, root causes, and step-by-step DIY repair checklists.

Avery & Sheet Label Grid Alignment Calibrator (PDF)

Fix annoying printer feed drift on Avery 5160, 5163, and round sticker sheets. Measure physical paper shift in millimeters, enter X/Y offsets, and generate perfectly centered print-ready PDFs.

Background Remover

Remove background from images

Backlink Anchor Text Analyzer

Analyze anchor text distribution in HTML content

Backslash Escape & Unescape

Escape or unescape backslash characters in strings

Baking Recipe Scaler & Servings Multiplier

Scale baking recipes up or down by serving multiplier to bake larger or smaller batches with precise proportions.

Ball Bearing L10 Life Hours & Equivalent Dynamic Load Sizer

Client-side interactive engineering calculator for ball bearing l10 life hours & equivalent dynamic load sizer. 100% private in-browser computation with zero server transit.

Bandsaw Blade Teeth Per Inch (TPI) & Cutting Speed Sizer

Client-side interactive engineering calculator for bandsaw blade teeth per inch (tpi) & cutting speed sizer. 100% private in-browser computation with zero server transit.

Bandwidth & File Download Time Calculator

Calculate how long it takes to download games, videos, or ISO files across various internet broadband speeds.

Bank Cheque / Check MICR E-13B Optical Decoder

Extract Routing Transit Number, Account Number, and Check Serial Number from the bottom magnetic ink character recognition (MICR) band of scanned checks.

Basal Metabolic Rate (BMR) Calculator

Calculate your exact Basal Metabolic Rate (BMR) using both the Mifflin-St Jeor and Harris-Benedict clinical formulas.

Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 to text

Base64 to Image

Convert Base64 strings back to images

Bass Trap Membrane Resonance Frequency & Depth Sizer

Client-side interactive engineering calculator for bass trap membrane resonance frequency & depth sizer. 100% private in-browser computation with zero server transit.

Battery C-Rate to Continuous Discharge Current & Run Time Sizer

Client-side interactive engineering calculator for battery c-rate to continuous discharge current & run time sizer. 100% private in-browser computation with zero server transit.

Battery Peukert Law Discharge Capacity & Runtime Calculator

Client-side interactive engineering calculator for battery peukert law discharge capacity & runtime calculator. 100% private in-browser computation with zero server transit.

Bcrypt Hash Generator

Generate bcrypt password hashes

Binary Arithmetic & Bitwise Calculator

Perform arithmetic addition, subtraction, multiplication, and bitwise logic operations on binary bitstrings.

Binary to Text

Convert binary data back to text

Biomass Pellet & Firewood Cord Heating BTU Equivalency Sizer

Client-side interactive engineering calculator for biomass pellet & firewood cord heating btu equivalency sizer. 100% private in-browser computation with zero server transit.

Blood Alcohol Content (BAC) Calculator

Calculate Blood Alcohol Concentration (BAC) and estimated time to reach 0.00% sobriety using the Widmark formula.

Bluebeam-Style PDF Vector Measurement Calibrator

Calibrate scale on architectural blueprints and floorplans without Bluebeam Revu software. Measure linear wall lengths and room square footage interactively.

Blur Faces in Photos Online Free — AI Privacy & GDPR Studio | img.ubify

Protect identities instantly. Automatically detect and blur faces in photos online for free. Use neural AI to obscure faces with blur, pixelation, or emojis. 100% private.

Blur Sensitive Info in Image Online — Privacy Protection | img.ubify

Protect your privacy by blurring faces, license plates, and sensitive data. Professional-grade obscuration that runs entirely on your device. 100% private.

BMI & Health Risk Calculator

Calculate your BMI and get a full health risk assessment — including cardiovascular risk, weight category context, and what the number really means.

BMI Calculator

Calculate Body Mass Index from height and weight

Boat & Marine Loan Financing Calculator

Calculate monthly boat and yacht loan payments across 10 to 20 year marine financing terms.

Body Fat Percentage Calculator (US Navy Method)

Calculate body fat percentage using the validated US Navy tape measure method with neck, waist, hip, and height dimensions.

Body Type & Shape Calculator

Calculate your Waist-to-Hip Ratio (WHR) and discover whether your silhouette matches an Hourglass, Rectangle, Pear, or Apple profile.

Bolt Tightening Torque & Preload Tension (Dry vs Lubricated)

Client-side interactive engineering calculator for bolt tightening torque & preload tension (dry vs lubricated). 100% private in-browser computation with zero server transit.

Bond Yield to Maturity (YTM) Calculator

Calculate bond Yield to Maturity (YTM), annual coupon cash flow, and discount/premium pricing.

Border Radius Generator

Generate CSS border-radius properties

Box Shadow Generator

Generate CSS box-shadow properties visually

Bra Size & Cup Measurement Calculator

Calculate accurate bra band and cup sizes based on snug underbust and standing bust measurements.

Braille Grade-1 & Grade-2 Tactile PDF Embosser & Stencil Maker

Generates calibrated 1:1 physical scale Braille documents (UEB standard 2.34mm dot spacing) for swell-form paper or slate & stylus embossing. Features reverse mirror mode and visual letter guides.

Braking Stopping Distance & Deceleration Rate Calculator

Client-side interactive engineering calculator for braking stopping distance & deceleration rate calculator. 100% private in-browser computation with zero server transit.

Brazil Passport Photo Maker — Official 5x7cm Online Studio | img.ubify

Make official Brazilian passport and visa photos online. 5x7cm and 3x4cm 3x4 (três por quatro) formats, white background, Polícia Federal compliant.

Break-Even Sales & Unit Volume Calculator

Calculate unit sales volume and gross revenue required to break even based on fixed and variable costs.

Brick, Paver & Mortar Joint Masonry Calculator

Client-side interactive engineering calculator for brick, paver & mortar joint masonry calculator. 100% private in-browser computation with zero server transit.

Broaching Force & Keyway Depth Tooth Load Sizer

Client-side interactive engineering calculator for broaching force & keyway depth tooth load sizer. 100% private in-browser computation with zero server transit.

Broadcast Safe Video Legal IRE Gamut & Clipping Checker

Client-side interactive engineering calculator for broadcast safe video legal ire gamut & clipping checker. 100% private in-browser computation with zero server transit.

Broken Link Checker

Find broken links in HTML content

Broken Link Finder

Scan a page for broken links

BRRRR Method Calculator (Buy, Rehab, Rent, Refinance, Repeat)

Model your cash recovery and equity created through the BRRRR real estate investing strategy after cash-out refinancing.

Business Valuation Calculator

Estimate business enterprise value using revenue and EBITDA multiples

Business Valuation Calculator

Estimate what your business is worth using revenue multiples, profit multiples, and asset-based methods — with a range and confidence indicator.

Butter Converter & Sticks to Grams Matrix

Instant multi-way converter between US butter sticks, cups, tablespoons, grams, and ounces with salted vs unsalted butter conversion guidelines

CAD .dxf Vector Blueprint Viewer & PDF Exporter

View and inspect architectural .dxf CAD blueprints and floorplans client-side without a $2,000/year AutoCAD license or uploading files to remote servers.

Caffeine Half-Life & Sleep Clearance Calculator

Calculate caffeine clearance curves based on beverage milligrams, half-life decay, and target bedtime.

California Statute of Limitations

California personal injury deadline (2 yrs under Cal. Civ. Proc. Code § 335.1) and contract deadlines.

Calories Burned by Activity Calculator

Calculate calories burned during workouts based on exercise type, intensity, duration, and body weight.

Camera Lens Macro Magnification Reproduction Ratio Sizer

Client-side interactive engineering calculator for camera lens macro magnification reproduction ratio sizer. 100% private in-browser computation with zero server transit.

Camera Sensor Crop Factor & 35mm Equivalent Focal Length Sizer

Client-side interactive engineering calculator for camera sensor crop factor & 35mm equivalent focal length sizer. 100% private in-browser computation with zero server transit.

Canada Passport Photo Maker — Official 50x70mm Online Studio | img.ubify

Create Canada passport photos that meet 2025 requirements. Official 50x70mm size, white background, and biometric centering. 100% private.

Canonical Tag Checker

Validate canonical tags in HTML

Car Insurance Estimator

Estimate target car insurance premiums based on vehicle, coverage, and driving history

Car Insurance Estimator

Insurers use secret zip-code data to price your risk. Use our 2026 adversarial estimator to find your target premium without giving away your phone number.

Car Lease Payment Calculator

Calculate monthly car lease payments by breaking down depreciation, lease finance charges, sales tax, and residual value.

Carbon Footprint Calculator

Calculate your personal carbon footprint from travel, diet, home energy, and purchases — with clear steps to reduce it.

Cascaded RF Noise Figure & Friis Amplifier Sensitivity Sizer

Client-side interactive engineering calculator for cascaded rf noise figure & friis amplifier sensitivity sizer. 100% private in-browser computation with zero server transit.

Case Converter

Convert text between uppercase, lowercase, title case, and more

Cassette Tape & VHS J-Card Printable Origami Layout

Generates calibrated 300 DPI audio cassette J-Card and VHS case inserts with exact crease fold lines, rotated spine typography, tracklist panels, and print trim guides.

Cat Age in Human Years Calculator

Calculate your cat's biological age in human years based on AAFP veterinary aging standards.

CCTV & Fisheye Lens Defisher

Defish curved wide-angle photos from dashcams, GoPro, security cameras, and video doorbells into straight architectural perspectives.

Celestial Coordinates RA / Dec to Local Altitude / Azimuth Sizer

Client-side interactive engineering calculator for celestial coordinates ra / dec to local altitude / azimuth sizer. 100% private in-browser computation with zero server transit.

Centrifugal Blower Fan Affinity Laws Performance Sizer

Client-side interactive engineering calculator for centrifugal blower fan affinity laws performance sizer. 100% private in-browser computation with zero server transit.

Centrifugal Well Pump Total Dynamic Head (TDH) Sizer

Client-side interactive engineering calculator for centrifugal well pump total dynamic head (tdh) sizer. 100% private in-browser computation with zero server transit.

Certificate of Deposit (CD) Calculator

Calculate interest earned on bank certificates of deposit (CD) with monthly compounding and APY.

Change Background to Blue for Passport Photo Online Free

Convert your background to solid blue for Malaysian, Kuwaiti, or specific ID documents. 100% private and biometric-ready.

Change Background to White for Passport Photo Online Free

Instantly add a plain white background to your ID or passport photo. 100% compliant for US, India, UK, and Schengen visas. Zero server uploads.

Character Encoder (UTF-8/ASCII)

Encode characters to UTF-8, ASCII, or Unicode code points

Child Support Calculator

Estimate monthly child support payments based on income and custody share

Child Support Calculator

Estimate monthly child support payments based on income, custody percentage, and state guidelines — for both paying and receiving parents.

China Passport Photo Maker — Official 33x48mm Online Studio

Create China passport photos online. Official 33x48mm size, white background, and biometric compliance. 100% private.

Chroma Key Green Screen Bleed Spill Subtractor & Clean Mattes

Client-side interactive engineering calculator for chroma key green screen bleed spill subtractor & clean mattes. 100% private in-browser computation with zero server transit.

Chroma Subsampling (4:4:4 vs 4:2:2 vs 4:2:0) Visualizer & Cleaner

Diagnose why red text, HUD graphics, and saturated UI icons look blurry over HDMI or in video captures. Visually inspect YCbCr luma/chroma decomposition and simulate YouTube/H.264 color loss.

Cinema Anamorphic Lens Aspect Ratio De-Squeeze Sizer

Client-side interactive engineering calculator for cinema anamorphic lens aspect ratio de-squeeze sizer. 100% private in-browser computation with zero server transit.

Cinematic Photo Filters Online — Professional LUT-Grade Effects | img.ubify

Apply professional cinematic filters to your photos. From Teal & Orange to 35mm Film grades. Instant previews and 100% private local processing.

Cinematography Shutter Angle to Shutter Speed Exposure Sizer

Client-side interactive engineering calculator for cinematography shutter angle to shutter speed exposure sizer. 100% private in-browser computation with zero server transit.

Circle Area, Circumference & Diameter Calculator

Calculate circle metrics instantly. Input either radius, diameter, circumference, or area to compute all other dimensions.

Civil Litigation Discovery Response Deadline & Holiday Calendar

Client-side interactive engineering calculator for civil litigation discovery response deadline & holiday calendar. 100% private in-browser computation with zero server transit.

Clean Reader Mode & Ad-Free PDF

Strip ads, trackers, and clutter from articles and format them into beautiful, printable ad-free PDFs

Closing Costs Calculator

Itemized breakdown of lender fees, title insurance, transfer taxes, and cash to close

Closing Costs Calculator

Estimate your total closing costs before you sign — broken down by lender fees, title fees, prepaid items, and state-specific charges.

CMYK & HEX to Closest Pantone (PMS) Spot-Color Matcher

Calculate the closest official coated Pantone spot-color code (PMS) and print formula for any HEX or CMYK color using Delta-E Euclidean color distance.

CNC Router & Mill Feeds & Speeds Chip Load Optimizer

Calculate optimal spindle RPM, surface feet per minute (SFM), feed rate (IPM and mm/min), and chip load per tooth across aluminum, hardwood, plywood, acrylic, and brass to prevent tool deflection.

Coaxial Cable Characteristic Impedance & Velocity Sizer

Client-side interactive engineering calculator for coaxial cable characteristic impedance & velocity sizer. 100% private in-browser computation with zero server transit.

Coaxial Quarter-Wave Stub Notch Filter Calculator

Code Diff Checker

Compare two code snippets and highlight differences

College & High School GPA Calculator

Calculate semester and cumulative grade point average (GPA) on a 4.0 scale with weighted course credits and honors tracking

College Tuition & Savings Calculator

Forecast the future cost of college tuition and calculate required monthly 529 college savings to graduate debt-free.

Color Name Finder

Find the closest named color for any hex value

Color Palette Generator

Generate beautiful color palettes

Color Picker

Pick and explore colors with HEX, RGB, and HSL values

Color Temperature Mired Shift & Gel Filter Calculator

Client-side interactive engineering calculator for color temperature mired shift & gel filter calculator. 100% private in-browser computation with zero server transit.

Compound Annual Growth Rate (CAGR) Calculator

Calculate Compound Annual Growth Rate (CAGR) between starting and ending values across multi-year periods.

Compound Interest Calculator

Calculate compound interest over time

Compound Miter Saw Blade Bevel & Angle Crown Molding Sizer

Client-side interactive engineering calculator for compound miter saw blade bevel & angle crown molding sizer. 100% private in-browser computation with zero server transit.

Compress PDF

Compress your PDF by optimizing images and removing unnecessary metadata. See before and after file sizes.

Compress PDF to 100KB

Compress and reduce PDF file size to exactly under 100KB for official portals.

Compress PDF to 1MB

Compress and reduce PDF file size to exactly under 1MB for official portals.

Compress PDF to 200KB

Compress and reduce PDF file size to exactly under 200KB for official portals.

Compress PDF to 2MB

Compress and reduce PDF file size to exactly under 2MB for official portals.

Compress PDF to 300KB

Compress and reduce PDF file size to exactly under 300KB for official portals.

Compress PDF to 500KB

Compress and reduce PDF file size to exactly under 500KB for official portals.

Compressed Air Pneumatic Pipe Sizing & Pressure Drop Calculator

Client-side interactive engineering calculator for compressed air pneumatic pipe sizing & pressure drop calculator. 100% private in-browser computation with zero server transit.

Conception Date Calculator

Calculate the estimated date of conception based on your baby's due date or last menstrual cycle.

Concrete Slab & Footing Calculator

Calculate the exact volume of concrete needed in cubic yards and pre-mix bags with waste margins.

Concrete Slab, Footing & Column Volume in Cubic Yards Calculator

Client-side interactive engineering calculator for concrete slab, footing & column volume in cubic yards calculator. 100% private in-browser computation with zero server transit.

Confidence Interval (CI) Calculator

Calculate confidence intervals and margin of error for a sample mean using normal z-critical values.

Contrast Ratio Checker

Check WCAG contrast ratios for accessibility

Cooking & Kitchen Measurement Converter

Convert recipe volume and weight measurements across Imperial and Metric culinary units.

Coplanar Waveguide (CPW) Grounded Transmission Line Sizer

Client-side interactive engineering calculator for coplanar waveguide (cpw) grounded transmission line sizer. 100% private in-browser computation with zero server transit.

Corrupted JPEG & PNG Header Repairer

Repair broken image magic bytes, corrupted JFIF/PNG headers, and truncated EOF streams 100% in your browser without sketchy software.

Counterflow Heat Exchanger LMTD Temperature Sizer

Client-side interactive engineering calculator for counterflow heat exchanger lmtd temperature sizer. 100% private in-browser computation with zero server transit.

Course Grade & Final Exam Calculator

Calculate your current course grade and determine the exact score needed on your final exam to secure your desired letter grade

Credit Card Payoff Calculator

Calculate payoff timeline and interest saved with accelerated payments

Credit Card Payoff Calculator

Escape the minimum payment trap. Discover the exact day you'll be debt-free and see how the 'Rule of Three' can slash years off your repayment timeline.

Cricut & Silhouette Multi-Color Vinyl Layer SVG Separator

Separate multi-colored sticker graphics and artwork into individual single-color SVG cut layers with corner alignment registration crosshairs for Cricut and Silhouette vinyl cutting.

Cron Expression Parser

Parse and explain cron schedule expressions

Crop PDF

Draw a crop area on the page preview. Apply to all pages or specific pages.

Crypto Dollar-Cost Averaging (DCA) Calculator

Simulate recurring Bitcoin, Ethereum, or crypto investments over time to measure total return versus lump-sum volatility.

CSS Flexbox & Grid Playground

Interactive visual design studio for CSS Flexbox, Grid layouts, Box Shadows, and Glassmorphism with real-time CSS code generator

CSS Formatter

Beautify and format CSS code with proper indentation

CSS Gradient Generator

Create CSS linear and radial gradients

CSS Grid Generator

Generate CSS Grid layouts visually

CSS Minifier

Minify CSS by removing comments and whitespace

CSV to JSON

Convert CSV data to JSON format

CSV to XML

Convert CSV data to XML format

Cups to Grams Baking & Ingredient Density Converter

Convert US cups to grams accurately based on real ingredient density for flour, white sugar, brown sugar, butter, and rolled oats.

Currency Converter

Convert between world currencies

Cyanotype & Sun-Print Digital Negative Curve Linearizer

Calibrates and inverts digital photographs into transparent contact negatives for alternative darkroom processes (Cyanotype, Van Dyke Brown, Platinum). Includes UV-blocking ink masks and a 21-step exposure test wedge.

Daily Calorie, TDEE & Macro Calculator

Calculate your Basal Metabolic Rate (BMR), Total Daily Energy Expenditure (TDEE), and target caloric intake for weight loss or muscle gain

Daily Protein Requirement Calculator

Calculate evidence-based daily protein requirements based on body weight, training intensity, and athletic goals.

Daily Water Intake & Hydration Calculator

Calculate recommended daily water intake in liters, fluid ounces, and standard 8 oz glasses.

Date Difference & Duration Calculator

Calculate exact elapsed days, calendar months, and working business days between any two dates.

Date Difference Calculator

Calculate the difference between two dates

DC Wire Gauge (AWG) Voltage Drop & Solar Wire Sizer

Debt Payoff Calculator

Compare Debt Avalanche vs. Debt Snowball repayment strategies with interest charts

Debt Payoff Calculator

The definitive tool for debt elimination. Compare Avalanche vs. Snowball methods with precision math to find your absolute fastest route to a $0.00 balance.

Decibel Voltage (dBu / dBV) to RMS Volts Audio Converter

Client-side interactive engineering calculator for decibel voltage (dbu / dbv) to rms volts audio converter. 100% private in-browser computation with zero server transit.

Defined Benefit Pension Calculator

Estimate your annual and monthly pension payout using service years, multiplier, and final average salary.

Delete Pages

Upload a PDF, preview all pages as thumbnails, select pages to remove, and download the updated document.

Delimiter & Column Surgery Studio

Swap columns, extract specific columns, change delimiters (CSV, TSV, Pipe, Semicolon), transpose matrices, and clean lines client-side

Deposition Transcript Word Count & Video Runtime Sizer

Client-side interactive engineering calculator for deposition transcript word count & video runtime sizer. 100% private in-browser computation with zero server transit.

Diagonal Invoice & Legal PDF Status Stamper

Apply official diagonal vector stamps (PAID, VOID, CONFIDENTIAL, DRAFT) across all pages of invoices and legal contracts without Adobe Acrobat fees.

Differential Pressure Orifice Plate & Flow Rate Calculator

Client-side interactive engineering calculator for differential pressure orifice plate & flow rate calculator. 100% private in-browser computation with zero server transit.

Digital Evidence Chain of Custody Audit Ledger & Hash Sizer

Client-side interactive engineering calculator for digital evidence chain of custody audit ledger & hash sizer. 100% private in-browser computation with zero server transit.

Discount Calculator

Calculate discounts and savings

Divorce Cost Estimator

Estimate total divorce costs by state, contested vs uncontested, and mediation

Divorce Cost Estimator

Estimate the total cost of a divorce based on your state, complexity level, and whether you plan to use an attorney or mediation.

DMX-512 Stage Lighting Universe Channel & Dip Switch Sizer

Client-side interactive engineering calculator for dmx-512 stage lighting universe channel & dip switch sizer. 100% private in-browser computation with zero server transit.

DNS Lookup

Look up DNS records for any domain

Dog Age in Human Years Calculator

Calculate your dog's true age in human years based on size breed category (Small, Medium, Large, Giant).

Domain Age Checker

Check when a domain was first registered

Draw on PDF

Use a freehand drawing tool on any page of your PDF. Choose pen color and thickness.

Drill Tap Size & Thread Percentage Sizer (Metric & Imperial)

Client-side interactive engineering calculator for drill tap size & thread percentage sizer (metric & imperial). 100% private in-browser computation with zero server transit.

Driving License Photo Maker — Official ID Size Online Studio

Create driving license photos online. Official sizes, solid backgrounds, and biometric compliance. 100% private.

Drug Interaction Checker

Check potential interactions and adverse warnings between medications

Drug Interaction Checker

Check whether two or more medications interact with each other — using open FDA data — before combining prescriptions.

Drywall Sheet & Joint Compound Calculator

Calculate drywall panels (4x8 or 4x12), mud buckets, and drywall screws needed for walls and ceilings.

Drywall Sheet Count & Joint Compound Estimating Calculator

Client-side interactive engineering calculator for drywall sheet count & joint compound estimating calculator. 100% private in-browser computation with zero server transit.

Duplicate Content Checker

Compare two texts for duplicate content

Duplicate Line Remover

Remove duplicate lines from text

Dynamic Range Crest Factor to RMS Headroom Meter

Client-side interactive engineering calculator for dynamic range crest factor to rms headroom meter. 100% private in-browser computation with zero server transit.

E-Commerce & Payment Gateway Fee Calculator

Calculate net profit margins after platform listing fees, transaction cuts, and Stripe/PayPal payment gateway processing fees.

E-Ink & Kindle Custom Manga & Comic Contrast Curve Optimizer

Pre-processes manga, webtoons, and graphic novels for E-Ink screens (Kindle, Kobo, Boox) by expanding gamma, eliminating washed-out grays, and sharpening ink lines.

eBay Seller Fee & Profit Calculator

Calculate eBay Final Value Fees (13.25%), optional promoted listing ad rates, payment processing, and net profit margins.

EBU R128 / ITU BS.1770 Broadcast LUFS & True-Peak Audio Meter

Inspect audio files for Integrated LUFS, Loudness Range (LRA), and True-Peak (dBTP) headroom client-side via Web Audio API. Provides target compliance offsets for Spotify, Apple Music, and TV Broadcast.

EIRP & Effective Radiated Power ERP Transmitter Sizer

Client-side interactive engineering calculator for eirp & effective radiated power erp transmitter sizer. 100% private in-browser computation with zero server transit.

Electric Vehicle (EV) Charging Cost Calculator

Calculate EV charging cost per full charge, cost per mile, and compare savings against gasoline vehicles.

Electric Vehicle (EV) vs. Gas Fuel Cost Calculator

Compare annual fueling expenses between charging an Electric Vehicle (Tesla, Rivian, Hyundai) vs. driving a gasoline car.

Electronic Heat Sink Thermal Resistance (C/W) Calculator

Client-side interactive engineering calculator for electronic heat sink thermal resistance (c/w) calculator. 100% private in-browser computation with zero server transit.

Embedded PDF Font Inspector & Extractor

Inspect and extract embedded TrueType and OpenType fonts from PDF documents directly in browser memory without Adobe software.

Emergency Fund Safety Net & HYSA Interest Calculator

Calculate recommended 3-month and 6-month cash reserve targets based on essential monthly expenses and annual interest earned in a High-Yield Savings Account.

Emoji Clipboard Picker & Unicode Code Inspector

1-click copy for trending emojis, Heart colors (Red, Pink, White, Purple), aesthetic symbols, Unicode code points, HTML entities, and Discord/Slack shortcodes with live clipboard string builder

Employee True Cost Calculator

Find out what an employee actually costs beyond their salary — including payroll taxes, benefits, insurance, and overhead — for any US state.

Engine Bore, Stroke, Displacement & Static Compression Ratio Sizer

Client-side interactive engineering calculator for engine bore, stroke, displacement & static compression ratio sizer. 100% private in-browser computation with zero server transit.

Engine Dyno SAE J1349 Atmospheric Correction Factor Calculator

Client-side interactive engineering calculator for engine dyno sae j1349 atmospheric correction factor calculator. 100% private in-browser computation with zero server transit.

Engine Valve Spring Seat Pressure & Coil Bind Sizer

Client-side interactive engineering calculator for engine valve spring seat pressure & coil bind sizer. 100% private in-browser computation with zero server transit.

Equal Loudness ISO 226 Phon to dB SPL Contour Visualizer

Client-side interactive engineering calculator for equal loudness iso 226 phon to db spl contour visualizer. 100% private in-browser computation with zero server transit.

ESC/POS Thermal Receipt Dot-Matrix Bytecode Generator

Design and test itemized thermal receipts for Epson TM-T88, Star, MUNBYN and generic POS printers. Generates pure raw binary bytecode (.bin), Hex stream, and Python/Arduino drivers.

Estate Tax & Inheritance Exemption Calculator

Calculate federal estate tax liability based on gross net worth and the unified lifetime gift exemption.

Eurorack 1V/Octave CV Voltage Divider & Attenuator

Calculate exact resistor voltage divider networks (E24 1% tolerance) to step down modular synthesizer control voltages (10V to 3.3V/5V) with 1V/Octave semitone quantization and real-time Web Audio pitch synthesis.

EV Charging Time, Level 1 / Level 2 / DC Fast Amperage Sizer

Client-side interactive engineering calculator for ev charging time, level 1 / level 2 / dc fast amperage sizer. 100% private in-browser computation with zero server transit.

EV vs Gas Car Cost Calculator

Compare the true 5-year cost of an electric vehicle versus a gas car — including purchase price, fuel, insurance, maintenance, and tax credits.

Exact-KB Target File Compressor

Compress image or document files to sit just under an exact target file size (e.g. 200KB, 100KB, 50KB) for government and visa upload portals.

Excel to JSON

Convert Excel spreadsheet data to JSON

Exhaust Primary Header Tube Diameter & Tuned Length Sizer

Client-side interactive engineering calculator for exhaust primary header tube diameter & tuned length sizer. 100% private in-browser computation with zero server transit.

Expert JPG to PNG Converter — Professional-Grade & 100% Private | img.ubify

Convert JPEG to lossless PNG instantly with img.ubify's Neural Engine. Enterprise-grade batch processing, zero-server uploads, and asset sovereignty.

Expert PNG to JPG Converter — Web-Efficient & 100% Private | img.ubify

Convert PNG to optimized JPG instantly with img.ubify's Neural Engine. Preserve visual clarity while maximizing loading performance. Zero server risks.

Expert WebP to JPG Converter — Global Asset Compatibility | img.ubify

Extract universally compatible JPEGs from WebP files instantly. Restore legacy support with our 100% private, browser-based conversion studio. Zero uploads.

Exponent & Power Calculator

Calculate base numbers raised to positive, negative, and fractional exponent powers with scientific notation formatting.

Expungement Eligibility Checker

Determine eligibility guidelines to seal or expunge a criminal record

Expungement Eligibility Checker

Find out whether you may be eligible to have a criminal record expunged — based on offense type, time elapsed, and state.

Extract Images

Upload a PDF and extract all embedded images. Download them as a zip file.

Extract Pages

Select which pages to keep from your PDF and create a new document with only those pages.

Extract Text

Extract all text from your PDF while preserving structure as much as possible. Download as .txt.

Fancy Text Generator

Generate text with Unicode decorations and styles

Favicon & App Icon Generator — Multi-Platform Icon Suite | img.ubify

Generate complete favicon sets for Web, iOS, and Android. Upload one logo and get a ZIP with all standard sizes, including .ico and manifest files. 100% private.

Favicon Generator

Generate favicons from any image

FHA Loan Calculator

Calculate FHA monthly mortgage payments with low 3.5% down payment, upfront 1.75% MIP fee, and monthly annual MIP.

Fiber Optic Link Loss Budget & Attenuation Calculator

Calculate total optical channel attenuation (dB) across singlemode (1310nm/1550nm) and multimode links with fusion splices, connector insertion loss, safety margin, and transceiver power certification.

Fill PDF Forms

Upload a PDF with form fields. All fields become editable so you can fill them in and download.

Film Exposure Foot-Candles to ISO & T-Stop Cine Light Sizer

Client-side interactive engineering calculator for film exposure foot-candles to iso & t-stop cine light sizer. 100% private in-browser computation with zero server transit.

Final Exam Grade Needed Calculator

Calculate the exact score needed on your final exam to pass your class with an A, B, or C based on current grade and exam weight.

Find & Replace

Find and replace text with optional regex support

FIRE (Financial Independence, Retire Early) Calculator

Calculate your exact FIRE retirement number, target nest egg using the 4% Safe Withdrawal Rule, and years to financial freedom.

Flexbox Layout Generator

Generate CSS Flexbox layouts interactively

Floor & Wall Tile Calculator

Calculate the number of tiles and boxes needed for floors, bathrooms, and backsplashes.

Floor Joist Span & Deflection L/360 Structural Sizer

Client-side interactive engineering calculator for floor joist span & deflection l/360 structural sizer. 100% private in-browser computation with zero server transit.

Florida Statute of Limitations

Florida personal injury deadline (2 yrs under Fla. Stat. § 95.11(4)(a) [HB 837 Reform]) and contract deadlines.

FM Synthesis Carrier-to-Modulator Frequency Ratio Explorer

Client-side interactive engineering calculator for fm synthesis carrier-to-modulator frequency ratio explorer. 100% private in-browser computation with zero server transit.

Font Pairing Tool

Discover beautiful Google Font pairings

Fraction Calculator & Step-by-Step Solver

Add, subtract, multiply, and divide fractions with step-by-step reduction, mixed number conversions, and decimal equivalents

France Passport Photo Maker — Official 35x45mm Online Biometric Studio

Create French passport, identity card (CNI), and visa photos online. Official 35x45mm ANTS-compliant standard, plain background, 100% private.

Free Calculators for Your Website & Blog

Embed free, responsive mortgage, loan, and math calculator widgets on your website with 1-click iframe codes.

Freelance Hourly Rate & Billable Hours Calculator

Calculate the true hourly billing rate needed to hit your target salary after self-employment tax, unbillable admin hours, and health insurance.

Freelance Rate Calculator

Calculate minimum billable hourly and day rates to hit target take-home income

Freelance Rate Calculator

Calculate the exact hourly rate you need to charge to hit your income goal — accounting for taxes, expenses, unpaid hours, and time off.

Fuel Injector Flow Rate CC/Min to Horsepower Sizer

Client-side interactive engineering calculator for fuel injector flow rate cc/min to horsepower sizer. 100% private in-browser computation with zero server transit.

Future Value (FV) Calculator

Calculate the future value of an initial investment and monthly deposits over time.

Game Boy Camera 2-Bit Tilemap & ROM Palette Extractor

Convert any photo into authentic 1998 Nintendo Game Boy Camera 4-color 2BPP pixel art. Features the original 4x4 Bayer dither matrix, 8x8 VRAM tilemap deduplication, and RGBDS/GB Studio assembly exports.

Gas Pipe CFM & Meter Pressure Sizing (NFPA 54)

Client-side interactive engineering calculator for gas pipe cfm & meter pressure sizing (nfpa 54). 100% private in-browser computation with zero server transit.

GCD & LCM Calculator

Calculate Greatest Common Divisor and Least Common Multiple

Generator Starting Motor Inrush Amps & Running Wattage Sizer

Client-side interactive engineering calculator for generator starting motor inrush amps & running wattage sizer. 100% private in-browser computation with zero server transit.

Geomagnetic Storm Kp-Index to Aurora Borealis Visibility Sizer

Client-side interactive engineering calculator for geomagnetic storm kp-index to aurora borealis visibility sizer. 100% private in-browser computation with zero server transit.

Georgia Statute of Limitations

Georgia personal injury deadline (2 yrs under Ga. Code § 9-3-33) and contract deadlines.

Germany Passport Photo Maker — Official 35x45mm Online Biometric Studio

Create official German passport (Passbild) and visa photos online. 35x45mm biometric standard, light background, zero uploads. 100% private.

GFR Kidney Function Calculator (CKD-EPI)

Calculate estimated Glomerular Filtration Rate (eGFR) using the clinical CKD-EPI creatinine equation.

GIF Maker

Create GIFs from multiple images

Glare & Washed-Out Barcode Contrast Restorer

Restore washed-out barcodes caused by camera flash glare and wrinkled cellophane packaging into crisp, high-contrast scannable clarity.

Government & Portal Upload Pre-Flight Checker

Test photos and documents against official US Visa, UK Passport, UPSC, and Schengen upload specifications before applying

Government KYC Photo & Signature Stack & Stitch Maker

Combine your passport photo on top and signature underneath in a single 300×400px image under 50KB for civil service exams and bank KYC portals.

GPS Dilution of Precision (DOP) Position Error Sizer

Client-side interactive engineering calculator for gps dilution of precision (dop) position error sizer. 100% private in-browser computation with zero server transit.

GPS Track (.gpx) Telemetry Video Overlay Generator

Convert Strava, Garmin, and Apple Watch .gpx routes into clean transparent speedometer, elevation gain, and telemetry HUD overlays for GoPro, YouTube, and action camera videos.

Gravel & Crushed Stone Calculator

Calculate gravel tonnage and cubic yards for driveways, French drains, and landscaping paths.

Gray Code, BCD & Binary Logic Studio

Binary to Gray code and Gray to Binary converter with step-by-step XOR derivations, BCD 8421 nibbles, and bitwise logic gates

Great Circle Haversine Distance & Initial Bearing GPS Sizer

Client-side interactive engineering calculator for great circle haversine distance & initial bearing gps sizer. 100% private in-browser computation with zero server transit.

Grid-Tie Solar Net Metering Annual True-Up Bill Estimator

Client-side interactive engineering calculator for grid-tie solar net metering annual true-up bill estimator. 100% private in-browser computation with zero server transit.

Grinding Wheel Surface Feet per Minute (SFPM) Max RPM Sizer

Client-side interactive engineering calculator for grinding wheel surface feet per minute (sfpm) max rpm sizer. 100% private in-browser computation with zero server transit.

GS1-128 SSCC-18 Pallet Barcode Generator & Verifier

Calculate official GS1 Modulo-10 checksums, verify 18-digit Serial Shipping Container Codes (SSCC), and generate compliant GS1-128 logistics pallet barcodes with Application Identifier (00) for Amazon FBA and Walmart.

Guitar Amplifier Output Transformer Impedance Ratio Sizer

Client-side interactive engineering calculator for guitar amplifier output transformer impedance ratio sizer. 100% private in-browser computation with zero server transit.

Half-Wave Dipole & Inverted-V Antenna Cutting Length Sizer

Client-side interactive engineering calculator for half-wave dipole & inverted-v antenna cutting length sizer. 100% private in-browser computation with zero server transit.

Hardwood Board Foot Volume & Rough-Sawn Lumber Pricing Calculator

Client-side interactive engineering calculator for hardwood board foot volume & rough-sawn lumber pricing calculator. 100% private in-browser computation with zero server transit.

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes

Hash Generator (Crypto)

Generate cryptographic hashes (MD5, SHA family)

Headphone Amplifier Output Power mW to dB SPL Loudness Sizer

Client-side interactive engineering calculator for headphone amplifier output power mw to db spl loudness sizer. 100% private in-browser computation with zero server transit.

Heat Pump COP to SEER2 & HSPF2 Heating Cost Analyzer

Client-side interactive engineering calculator for heat pump cop to seer2 & hspf2 heating cost analyzer. 100% private in-browser computation with zero server transit.

Helical Axial-Mode Circular Polarization Antenna Sizer

Client-side interactive engineering calculator for helical axial-mode circular polarization antenna sizer. 100% private in-browser computation with zero server transit.

HELOC Payment Calculator

Calculate monthly HELOC payments during the 10-year interest-only draw period versus the 20-year repayment phase.

HEX to Binary & Decimal

Convert between hexadecimal, binary, and decimal

HEX to RGB & RGBA

Convert HEX color codes to RGB and RGBA values

Hexadecimal Calculator & ASCII Converter

Calculate base-16 hexadecimal arithmetic with simultaneous decimal, binary, and ASCII string representations.

Hexle — Daily CSS Hex Color Guessing Puzzle

Guess the daily 6-character hexadecimal CSS color code in 6 tries. Features real-time swatch comparison, RGB channel delta clues, and shareable Wordle-style score grids.

High-Speed Slow-Motion Frame Rate to Shutter Light Flicker Sizer

Client-side interactive engineering calculator for high-speed slow-motion frame rate to shutter light flicker sizer. 100% private in-browser computation with zero server transit.

High-Yield Savings Account (HYSA) Calculator

Calculate real compounded interest on modern 4.5% - 5.5% High-Yield Savings Accounts vs. traditional 0.01% checking accounts.

Historical Inflation & Purchasing Power Calculator

Calculate how cumulative inflation erodes purchasing power and what past dollar amounts are worth today.

HMAC Generator

Generate HMAC authentication codes

Home Affordability Calculator

Calculate maximum purchase budget and comfortable monthly mortgage payments

Home Affordability Calculator

Calculate the maximum home price your income and debts can support — with full monthly payment breakdown and down payment analysis.

Home Battery Storage Round-Trip Efficiency Loss Sizer

Client-side interactive engineering calculator for home battery storage round-trip efficiency loss sizer. 100% private in-browser computation with zero server transit.

Home Down Payment Savings Calculator

Calculate how much cash you need to buy a home (down payment + closing costs) and plan your monthly savings goal.

Home Energy Audit Tool

Enter your appliances and usage patterns and get a complete breakdown of your home energy costs — with the highest-impact changes to make.

Home Solar Panel Payback & ROI Calculator

Calculate the break-even years, 30% Federal Solar ITC tax credit, and 25-year lifetime net electric bill savings for home solar panels.

Home Studio & Theater Sabine RT60 Decay Calculator

Horn Subwoofer Acoustic Flare Cutoff Frequency Sizer

Client-side interactive engineering calculator for horn subwoofer acoustic flare cutoff frequency sizer. 100% private in-browser computation with zero server transit.

Hospital Medical MRI & CT Scan DICOM (.dcm) Patient Viewer

View patient MRI, CT, and X-Ray radiological scans directly in your browser with Window Center / Width radiologist contrast calibration without installing sketchy desktop PACS software.

House R-Value Insulation & Heat Loss BTU/hr Calculator

Client-side interactive engineering calculator for house r-value insulation & heat loss btu/hr calculator. 100% private in-browser computation with zero server transit.

Hreflang Tag Validator

Validate hreflang tags for multilingual SEO

HTML Escape & Unescape

Escape or unescape HTML entities

HTML Extractor & Stripper

Extract text by stripping all HTML tags from content

HTML Minifier

Minify HTML by removing unnecessary whitespace

HTML Table to CSV & Excel Converter

Convert HTML tables or web data into clean CSV, Excel (XLSX), JSON, and Markdown formats with live data grid preview

HTML to Markdown

Convert HTML code to Markdown format

HTML to PDF

Convert HTML content to downloadable PDF

HTML to PDF

Paste HTML code or upload an .html file and convert it to a PDF document.

HTTP Header Checker

Inspect HTTP response headers for any URL

HTTP Security Headers & CSP Configuration Auditor

Audit Content-Security-Policy (CSP), HSTS, X-Frame-Options, Permissions-Policy, and generate copy-paste Nginx and Cloudflare security headers.

HTTP Status Code Lookup

Look up HTTP status codes and their meanings

HVAC Airflow CFM, Friction Rate & Duct Sizer (ACCA Manual D)

Size round spiral pipes and equivalent rectangular sheet metal ductwork based on room CFM airflow, friction rate per 100 ft, and quiet residential velocity limits following ACCA Manual D guidelines.

HVAC Refrigerant PT Chart, Superheat & Subcooling Calculator

Hydraulic Cylinder Force, Flow Rate & Cycle Time Calculator

Hydroelectric Micro-Turbine Head & Flow Wattage Calculator

Client-side interactive engineering calculator for hydroelectric micro-turbine head & flow wattage calculator. 100% private in-browser computation with zero server transit.

I2C Bus Pull-Up Resistor & Bus Capacitance Sizer

ID & Passport Photo Maker — Print-Ready 35x45mm & 2x2in Studio | img.ubify

Create professional ID, Passport, and Visa photos in seconds. Auto-crop to exact requirements, remove background, and generate print-ready grid sheets (4-up, 12-up) locally. 100% private.

ID Photo Background Remover | Official White & Blue Background Adder

Instantly change passport and visa photo backgrounds to white, light blue, or grey. 100% compliant with government biometric standards. Zero-server local processing.

Ideal Body Weight Calculator

Compare target healthy body weights across 4 established medical formulas (Devine, Robinson, Miller, and Hamwi).

Illinois Statute of Limitations

Illinois personal injury deadline (2 yrs under 735 Ill. Comp. Stat. § 5/13-202) and contract deadlines.

Image Color Palette Extractor — Professional Design Intelligence | img.ubify

Extract vibrant color palettes from any image instantly. Get hex codes, RGB values, and professional color schemes for your design projects. 100% private.

Image Color Picker

Pick colors from any uploaded image

Image Compressor

Compress images to reduce file size

Image Compressor — Reduce File Size Free Online | img.ubify

Compress images free online. Reduce JPG, PNG, WebP file size without visible quality loss. 100% browser-based.

Image Cropper

Crop images to specific dimensions

Image Cropper — Focus & Frame Free Online | img.ubify

Crop images online for free. Custom aspect ratios, social media presets, and batch cropping. No upload, 100% private.

Image DPI Changer — Convert to 300 DPI for Print Online Free

Change image DPI to 300, 600, or custom levels instantly. Fix low-resolution photos for government submission and professional printing. 100% private.

Image Format Converter

Convert between PNG, JPG, and WebP formats

Image Metadata (EXIF) Viewer

View image metadata and EXIF data

Image Resizer

Resize images to specific dimensions

Image Resizer — Resize Images Free Online | img.ubify

Resize images free online. Set exact dimensions in px or %. Lock aspect ratio. JPG, PNG, WebP.

Image to Base64

Convert images to Base64 encoded strings

Image to Base64 Converter — Developer Utility | img.ubify

Convert images to Base64 strings instantly. Perfect for CSS, JSON, and HTML embeds. 100% private local processing.

Image to PDF

Upload one or more images (JPG, PNG, WEBP) and convert them into a PDF. Each image becomes a page.

Image to PDF Studio — Convert JPG to PDF Online Free | img.ubify

Convert JPG, PNG, and WebP to professional PDF documents. Multi-photo stitching, margin controls, and 100% private local processing. No upload required.

In-Browser Grep, Sort & Line Filter Studio

Client-side Unix stream tools: Regex Grep, Head/Tail line slicing, natural numerical sorting, duplicate removal, and email/URL/IP extractor

India Aadhar Card Photo Maker — Official 23x33mm Online Studio

Resize and prepare photos for India's Aadhar card. Official 23x33mm size, white background. 100% private.

India PAN Card Photo Maker — Official 25x35mm Online Studio

Create PAN card photos online. Official 2.5x3.5cm size, white background, and biometric compliance. 100% private.

Indian Passport Photo Maker — Free 35x45mm Tool | img.ubify

Make an Indian passport photo online free. Official 35x45mm size, white background, biometric standards. Also perfect for PAN Card, Aadhar & Visa photos. 100% private.

Instant Direct Deposit Voided Check PDF Generator

Creates a bank-compliant sample voided check with customized routing, account number, MICR-E13B font strip, and watermark for payroll direct deposit and ACH setup.

Intermittent Fasting Schedule Calculator

Calculate your daily fasting schedule, feeding window, and autophagy phases for intermittent fasting protocols.

Intermodulation Distortion (IMD3) Third-Order Intercept Sizer

Client-side interactive engineering calculator for intermodulation distortion (imd3) third-order intercept sizer. 100% private in-browser computation with zero server transit.

Internal Link Extractor

Extract all internal and external links from HTML

Internal Rate of Return (IRR) Calculator

Calculate internal rate of return (IRR) on multi-year business projects and commercial real estate cash flows.

Internet Download Time & Transfer Speed Calculator

Calculate how long it takes to download games, files, or video assets across 100 Mbps, 300 Mbps, 1 Gbps fiber, or Starlink connections.

Internet Speed Test

Test broadband download speed, latency, and ping connection quality

Internet Speed Test

Test your download speed, upload speed, and ping — with ISP detection, connection type, result history, and a shareable speed report.

Investment Return Calculator

Calculate compound investment returns and portfolio growth over time

Investment Return Calculator

Unlock the math of wealth generation. Visualize compound interest, the 'Cost of Waiting' penalty, and find the portfolio balance you need for life.

Invisible Character & Blank Space Generator

Copy invisible empty characters (Hangul Filler U+3164, Zero-Width Space U+200B) for Discord names, WhatsApp blank messages, and bio spacing with built-in hidden character detector

IP Address Lookup

Get geolocation data for any IP address

IP Subnet & CIDR Prefix Calculator

Calculate IPv4 network address, usable host ranges, broadcast IP, and wildcard masks from CIDR notation.

IPv4 Integer, Hex & Binary Radix Matrix

Convert IPv4 addresses simultaneously between Dotted Quad, 32-bit Integer, Hex, Binary, and reverse in-addr.arpa with subnet scope detection

Ireland Passport Photo Maker — Official 35x45mm Online Studio | img.ubify

Create compliant Irish passport and passport card photos online. Official 35x45mm format, Department of Foreign Affairs compliant. 100% private.

Italy Passport Photo Maker — Official 35x45mm Online Studio | img.ubify

Create compliant Italian passport and visa photos online. Official 35x45mm (fototessera) format, white background, biometric head alignment. 100% private.

Japan Passport Photo Maker — Official 35x45mm Online Studio

Create official Japanese passport and visa photos online. 35x45mm biometric standard, white background, no uploads. 100% private.

JavaScript Beautifier & Minifier

Beautify or minify JavaScript code

JPG to WebP Converter — Next-Gen Image Compression | img.ubify

Transform JPEGs into modern WebP assets. Shrink your image payload by up to 35% without visible quality loss. 100% private.

JSON Formatter & Validator

Format, beautify, and validate JSON data with syntax highlighting

JSON Minifier

Minify JSON by removing all whitespace and formatting

JSON to CSV

Convert JSON data to CSV format

JSON to Excel

Convert JSON data to Excel format

JSON to XML

Convert JSON data to XML format

JSON to YAML

Convert JSON data to YAML format

JWT (JSON Web Token) Debugger & Claims Inspector

Decode, inspect, and analyze JWT tokens offline. Check expiration timestamps (exp/iat/nbf), issuer claims, and signature algorithms privately.

JWT Decoder

Decode and inspect JSON Web Token payloads

Keyword Density Checker

Analyze keyword frequency and density in text

Laser & Vinyl Cutter Kerf Offset & Path Welder (SVG)

Compensates for laser beam width (kerf) by expanding outside profiles and shrinking inner holes so interlocking joints and gears fit tightly. Auto-welds broken bezier nodes.

Lathe Turning Surface Speed (SFM) & Feed Rate per Revolution

Client-side interactive engineering calculator for lathe turning surface speed (sfm) & feed rate per revolution. 100% private in-browser computation with zero server transit.

LC Resonant Tank Frequency & Q-Factor Calculator

Client-side interactive engineering calculator for lc resonant tank frequency & q-factor calculator. 100% private in-browser computation with zero server transit.

Lean Body Mass (LBM) Calculator

Calculate lean body mass (muscles, bones, organs, and water) without invasive hydrostatic tank testing.

LED Video Wall Resolution, Pixel Pitch & Viewing Distance Sizer

Client-side interactive engineering calculator for led video wall resolution, pixel pitch & viewing distance sizer. 100% private in-browser computation with zero server transit.

Lens Depth of Field & Bokeh Blur Circle Simulator

Simulate optical Depth of Field (DoF), near and far sharp limits, hyperfocal distance, and background bokeh circle-of-confusion diameter across Full Frame, APS-C, Super 35, and Medium Format camera sensors with real-time ray diagrams.

Life Insurance Needs Calculator

Calculate exact life insurance coverage gap using the DIME method

Life Insurance Needs Calculator

Don't leave your family's future to a sales agent. Calculate your exact coverage gap using the DIME-2026 method and secure true financial peace of mind.

Lined Notebook & Graph Paper Line Eraser

Erase distracting blue notebook lines and graph grids from photos of handwritten homework or engineering proofs, leaving your handwriting on clean white paper.

Lithium 18650 / 21700 S/P Battery Pack Balancer & Busbar Sizer

Design custom Series-Parallel (S/P) battery packs for DIY e-bikes, robotics, and solar storage. Computes nominal and peak pack voltages, total Watt-hours, continuous discharge ampacity, and pure nickel strip vs copper busbar gauge.

Live HTML & CSS Viewer (TryIt Editor)

Interactive live HTML, CSS, and JavaScript real-time editor and code sandbox with responsive viewport previews and instant download

Live Streaming RTMP / SRT Video Bitrate & Bandwidth Sizer

Client-side interactive engineering calculator for live streaming rtmp / srt video bitrate & bandwidth sizer. 100% private in-browser computation with zero server transit.

LLC vs S-Corp Tax Calculator

Compare self-employment tax savings between LLC and S-Corporation salary distributions

LLC vs S-Corp Tax Calculator

Compare your tax liability as an LLC versus an S-Corp at your income level — and find out at what point switching structures saves you money.

Loan & EMI Calculator

Calculate monthly loan payments and EMI

Loan EMI & Amortization Calculator

Advanced amortization schedule and extra payment interest savings calculator

Loan EMI & Amortization Calculator

Identify why you're paying 80% interest in year one. Use our advanced amortization engine to find the 'extra payment' sweet spot and beat the bank.

Logarithm Calculator (log, ln, log2)

Calculate natural logarithms (ln), base-10 common logs, binary base-2 logs, and arbitrary base logarithms.

LoRaWAN Long-Range Wireless Link Margin & RSSI Predictor

Client-side interactive engineering calculator for lorawan long-range wireless link margin & rssi predictor. 100% private in-browser computation with zero server transit.

Lorem Ipsum Generator

Generate placeholder Lorem Ipsum text

Love Compatibility & Name Match Calculator

Playful love compatibility and name numerology calculator for couples and friends.

Macronutrient Split Calculator

Calculate customized daily macronutrient grams and caloric distributions based on your fitness goals.

Magnetic Loop Small Transmitting Antenna Efficiency Sizer

Client-side interactive engineering calculator for magnetic loop small transmitting antenna efficiency sizer. 100% private in-browser computation with zero server transit.

Markdown to HTML

Convert Markdown text to HTML

Markdown to PDF

Convert Markdown text to downloadable PDF

Markdown Viewer & Live Editor

Split-screen GitHub Flavored Markdown editor with live HTML preview, syntax formatting toolbar, word count, and HTML/PDF export

Mastering Equalizer Q-Factor to Bandwidth in Octaves Converter

Client-side interactive engineering calculator for mastering equalizer q-factor to bandwidth in octaves converter. 100% private in-browser computation with zero server transit.

Matrix Determinant & Inverse Calculator (2x2 & 3x3)

Calculate 2x2 and 3x3 matrix determinants, trace, and invertibility matrix properties.

Meme Generator Pro — Viral Meme Creator No Watermark | img.ubify

Create viral memes instantly with our pro-grade editor. Choose from classic templates or upload your own. 100% private, no watermarks, and high-res exports.

Menstrual Period & Cycle Tracker

Track your menstrual cycle and forecast your next 3 period start dates and PMS timelines.

Mental Health Symptom Checker

Confidential symptom self-assessment score and mental health guidance

Mental Health Symptom Checker

Answer a short questionnaire and get a score-based assessment of common mental health symptoms — with guidance on when to seek professional support.

Mercari Seller Fee & Direct Deposit Calculator

Calculate Mercari seller payouts, direct deposit fees ($2.00 fee under $10 or free ACH), and net take-home earnings.

Merge PDFs

Upload multiple PDF files and combine them into a single document. Drag and drop to reorder before merging.

Meta Tag Analyzer

Analyze and extract meta tags from HTML content

Metal Hardness Brinell, Rockwell C, Vickers & Tensile Converter

Client-side interactive engineering calculator for metal hardness brinell, rockwell c, vickers & tensile converter. 100% private in-browser computation with zero server transit.

Metal Thermal Heat Shrink Fit Interference Diameter Sizer

Client-side interactive engineering calculator for metal thermal heat shrink fit interference diameter sizer. 100% private in-browser computation with zero server transit.

Mexico Passport Photo Maker — Official SRE Standards | img.ubify

Create compliant Mexican passport photos online free. Official SRE requirements, white background, no jewelry or glasses, head alignment. 100% private.

Michigan Statute of Limitations

Michigan personal injury deadline (3 yrs under Mich. Comp. Laws § 600.5805(2)) and contract deadlines.

Micro-QR Code (11×11 to 17×17) High-Density Generator

Generates ultra-compact Micro-QR matrix codes (M1, M2, M3, M4) with a single finder pattern for PCB circuit boards, electronics serial tags, and watchmaker parts. Vector SVG and integer-scaled PNG.

Microphone Polar Pattern Proximity Effect & Off-Axis Attenuation

Client-side interactive engineering calculator for microphone polar pattern proximity effect & off-axis attenuation. 100% private in-browser computation with zero server transit.

Microstrip Transmission Line Characteristic Impedance (IPC-2141)

Client-side interactive engineering calculator for microstrip transmission line characteristic impedance (ipc-2141). 100% private in-browser computation with zero server transit.

MIDI File Event List & Polyphonic Note Visualizer

Inspect raw Standard MIDI (.mid) files directly in your browser with zero DAW plugins or risky downloads. View timing ticks, pitch velocity, CC automation, and audition tracks with the built-in Web Audio synth.

Midpoint & Distance Formula Calculator

Calculate the mathematical midpoint coordinates (M) and Euclidean straight-line distance between two 2D points.

MIME Type Checker

Look up MIME types for file extensions

Mobile Deposit Check Print Aligner (Front & Endorsement Box)

Generates a calibrated 8.5×11″ sheet with exact 6×2.75″ check front and back endorsement boxes matching mobile banking camera viewports to prevent mobile deposit app rejection.

Mock Data & API Payload Generator

Generate synthetic dummy data for APIs and databases: User profiles, e-commerce, and transactions exported to JSON, CSV, YAML, or SQL

Moon Phase Illumination Percentage & Next Full Moon Predictor

Client-side interactive engineering calculator for moon phase illumination percentage & next full moon predictor. 100% private in-browser computation with zero server transit.

Morse Code Converter

Convert between text and Morse code

Mortgage Affordability Calculator

Calculate home-buying power and monthly payment breakdown with taxes and insurance

Mortgage Affordability Calculator

Stop guessing your home-buying power. Get a high-precision breakdown of your true monthly payment including PMI, property taxes, and the '2026 Maintenance Multiplier'.

Mortgage Refinance Break-Even Calculator

Determine if refinancing your mortgage saves money after accounting for closing costs and new loan terms.

Mortise and Tenon Joint Geometry & Proportional Sizer

Client-side interactive engineering calculator for mortise and tenon joint geometry & proportional sizer. 100% private in-browser computation with zero server transit.

Moving Cost Estimator

Get a realistic estimate of what your move will cost — based on distance, home size, and whether you're hiring movers or doing it yourself.

MPPT Solar Charge Controller Voc Cold Temperature Safety Sizer

Client-side interactive engineering calculator for mppt solar charge controller voc cold temperature safety sizer. 100% private in-browser computation with zero server transit.

Mulch, Soil & Landscaping Calculator

Calculate garden mulch and topsoil volume in cubic yards and 2 cubic foot bags based on depth.

Multi-Color E-Paper 7-Color Dither & Byte Array Engine

Convert color photos for Waveshare 7-Color ACeP (Spectra 6) and 3-color BWR e-Paper displays using custom Floyd-Steinberg and Atkinson error diffusion. Exports ready-to-flash C hex byte arrays for Arduino and ESP32 display drivers.

Multi-Hash Checksum & Integrity Verifier

Calculate MD5, SHA-1, SHA-256, SHA-512, CRC-32, Adler-32, and NTLM simultaneously with target checksum matching and report export

Multi-LED Current Limiting Resistor & Wattage Sizer

Multi-Tool Pipeline & Chain Runner

Visual data and text transformation pipeline. Chain multiple formatters, Base64 encoders, deduplicators, and sanitizers together with real-time in-browser execution.

Music Sheet Key Transposition & Pitch Shift PDF Re-Notator

Transposes sheet music scores up or down semitones with key signature indicators, clef shifts, and vocal octave adjustments for singers and instrumentalists.

Near-Field to Far-Field Rayleigh Antenna Distance Sizer

Client-side interactive engineering calculator for near-field to far-field rayleigh antenna distance sizer. 100% private in-browser computation with zero server transit.

Net Worth Calculator

Track assets vs. liabilities and benchmark your financial standing

Net Worth Calculator

Calculate your real financial truth serum. Track assets vs. liabilities with 2026 inflation-adjusted benchmarks and see exactly where you stand in the top 10%.

Netherlands Passport Photo Maker — Official 35x45mm Online Tool | img.ubify

Create compliant Dutch passport and ID card (paspoort) photos online. Official 35x45mm format, light grey background, Rijksoverheid compliant.

Neutral Density (ND) Filter Exposure Stops & Shutter Speed Sizer

Client-side interactive engineering calculator for neutral density (nd) filter exposure stops & shutter speed sizer. 100% private in-browser computation with zero server transit.

New York Statute of Limitations

New York personal injury deadline (3 yrs under N.Y. C.P.L.R. § 214(5)) and contract deadlines.

North Carolina Statute of Limitations

North Carolina personal injury deadline (3 yrs under N.C. Gen. Stat. § 1-52(16)) and contract deadlines.

Notary & Legal Exhibit Bates Numbering & Stamp PDF Sequencer

100% Client-Side in-browser PDF stamping. Sequentially applies Bates discovery numbering (e.g. DEF-000001) or legal exhibit stickers without uploading confidential files to any third-party server.

Number Base Converter

Convert numbers between binary, octal, decimal, and hex

Number Sequence & Series Calculator

Calculate arithmetic and geometric number sequences, common differences, common ratios, nth terms, and series sums.

Number to Words

Convert numbers to written words

Number to Words & Roman Numeral Engine

Convert numbers into words formatted for bank checks (USD, EUR, GBP) and contracts, plus two-way Roman numeral converter with step proofs

OCR PDF

Use OCR to recognize text in scanned or image-based PDFs. See progress as each page is processed.

Off-Grid Daily Watt-Hour Energy Budget & Solar Array Sizer

Client-side interactive engineering calculator for off-grid daily watt-hour energy budget & solar array sizer. 100% private in-browser computation with zero server transit.

Off-Grid Generator Autostart Battery State-of-Charge Sizer

Client-side interactive engineering calculator for off-grid generator autostart battery state-of-charge sizer. 100% private in-browser computation with zero server transit.

Official Notary Public Jurat & Acknowledgment Journal Ledger Sizer

Client-side interactive engineering calculator for official notary public jurat & acknowledgment journal ledger sizer. 100% private in-browser computation with zero server transit.

Ohio Statute of Limitations

Ohio personal injury deadline (2 yrs under Ohio Rev. Code § 2305.10) and contract deadlines.

Oil Cooler Sizing & Heat Rejection BTU/hr Calculator

Client-side interactive engineering calculator for oil cooler sizing & heat rejection btu/hr calculator. 100% private in-browser computation with zero server transit.

One Rep Max (1RM) Calculator

Calculate your One Rep Maximum (1RM) for bench press, squat, and deadlift from sub-maximal repetitions.

Op-Amp Closed-Loop Gain & Cutoff Bandwidth Calculator

Open Graph Previewer

Preview how your page looks when shared on social media

Optical Distance to Horizon & Line of Sight Radar Sizer

Client-side interactive engineering calculator for optical distance to horizon & line of sight radar sizer. 100% private in-browser computation with zero server transit.

Optical Field of View (FOV) Horizontal / Vertical Angle Sizer

Client-side interactive engineering calculator for optical field of view (fov) horizontal / vertical angle sizer. 100% private in-browser computation with zero server transit.

Orthographic to Isometric 2.5D Technical Drawing Projector

Transforms 2D multi-view orthographic profiles (Front, Top, Right) into accurate 30° axonometric isometric projections with hidden-line suppression and vector SVG export.

Oven to Air Fryer Calculator & Convection Converter

Convert conventional oven recipe cook times and temperatures to rapid vortex air frying with mid-cycle basket shake timers and food presets

Ovulation & Fertility Window Calculator

Calculate your peak fertility window and estimated ovulation day based on your last period and cycle length.

Oxy-Acetylene Torch Tip Size & Gas Pressure Flow Sizer

Client-side interactive engineering calculator for oxy-acetylene torch tip size & gas pressure flow sizer. 100% private in-browser computation with zero server transit.

Page Size Checker

Check the total page size of a URL

Page Word Count (SEO)

Count words on a page for SEO analysis

Paint Coverage & Gallons Calculator

Calculate interior and exterior paint gallons needed based on wall dimensions and coats.

Palindrome Checker

Check if a word or phrase is a palindrome

Parabolic Dish Antenna Gain & Beamwidth Calculator

Client-side interactive engineering calculator for parabolic dish antenna gain & beamwidth calculator. 100% private in-browser computation with zero server transit.

Passive 2-Way & 3-Way Speaker Crossover Component Sizer

Client-side interactive engineering calculator for passive 2-way & 3-way speaker crossover component sizer. 100% private in-browser computation with zero server transit.

Passport & Visa 4×6 Print Sheet ($0.35 Hack)

Lay out 6 or 8 official passport/visa photos on a standard 4×6 inch sheet to print at Walgreens, CVS, or Walmart for $0.35 instead of $17.99.

Password Entropy & Brute-Force Crack Time Simulator

Calculate Shannon password entropy bits, brute-force cracking time on supercomputers and GPU clusters, and NIST 800-63B compliance 100% offline.

Password Generator

Generate strong, random passwords

Password Strength Checker

Check the strength of any password

Past Exam & Study PDF Highlighter Remover

Erase distracting fluorescent yellow, green, and pink highlighter marks from scanned study notes and past papers while keeping black text intact.

PCB Trace Width & Current Capacity Calculator (IPC-2152)

PDF Bloat & Stream Composition Analyzer

Analyze internal PDF streams to discover whether uncompressed photos, full-weight fonts, or vector clutter are inflating your file size

PDF Buddy — Complete PDF Utility

The most powerful free PDF tool online. Merge, split, compress, and edit PDF files instantly in your browser — no sign up or credit card ever required.

PDF Metadata

View all metadata including title, author, creation date. Edit and save updated metadata.

PDF Saddle-Stitch Booklet Imposer

Reorder multi-page PDF documents into duplex fold-and-staple signatures for printing booklets, church bulletins, playbills, and zines on home printers.

PDF to HTML

Convert your PDF to a basic HTML representation. Download the result as an .html file.

PDF to Image

Convert each page of your PDF into an image. Choose between JPG and PNG format and set quality.

PDF to Text

Extract all text from your PDF. View it on screen and download as a .txt file.

PDF Zero-Color Toner Saver (Bypass Empty Color Cartridges)

Laser printer refusing to print black-and-white because Cyan or Magenta is low? Strips rich-black CMY channels and forces pure 100% K-channel black ink commands.

Pennsylvania Statute of Limitations

Pennsylvania personal injury deadline (2 yrs under 42 Pa. Cons. Stat. § 5524(2)) and contract deadlines.

Percent Error Calculator

Calculate experimental percent error and absolute discrepancy between observed laboratory data and true theoretical values.

Percentage Calculator

Calculate percentages, increases, and decreases

Permutations & Combinations (nPr & nCr) Calculator

Calculate permutations nPr (order matters) and combinations nCr (order does not matter) with factorial steps.

Personal Injury Settlement Estimator

Estimate compensation ranges for personal injury claims based on damages and lost income

Personal Injury Settlement Estimator

Get a realistic estimate of what a personal injury claim might be worth — based on injury type, severity, lost income, and state.

Phone-Scan Paper Whitener & Shadow Eraser

Erase hand shadows, yellow lighting, and dingy paper backgrounds from phone camera photos. Converts photos into crisp flatbed scans client-side.

Photo & Document Metadata Forensic Inspector

Inspect, analyze, and sanitize hidden GPS coordinates, camera serials, and privacy metadata from photos and documents client-side

Photoshop PSD & AI File Instant Web Inspector

Inspect and view Adobe Photoshop (.psd) and Illustrator (.ai) files in high-resolution directly in your browser without an Adobe subscription.

Photovoltaic Array Tilt Angle by Latitude & Seasonal Adjustment

Client-side interactive engineering calculator for photovoltaic array tilt angle by latitude & seasonal adjustment. 100% private in-browser computation with zero server transit.

Photovoltaic Solar Panel Angle & Inter-Row Shading Obstruction Simulator

Calculate exact minimum row-to-row spacing distance (D) to prevent front solar panel rows from casting shadows onto back rows during the critical winter solstice at 9 AM – 3 PM.

Ping Tool

Ping a host to check connectivity

Pipe Water Flow Darcy-Weisbach Friction Head Loss Calculator

Client-side interactive engineering calculator for pipe water flow darcy-weisbach friction head loss calculator. 100% private in-browser computation with zero server transit.

Pixels to MM Converter — 300 DPI Scale Calculator | img.ubify

Convert pixels to millimeters, centimeters, and inches for official document scaling. Accurate 2025 conversion for ID and passport design. 100% private.

Placeholder Image Generator

Generate placeholder images with custom dimensions

Plasma Cutter Air CFM, Amps & Cut Speed Travel Sizer

Client-side interactive engineering calculator for plasma cutter air cfm, amps & cut speed travel sizer. 100% private in-browser computation with zero server transit.

PNG to SVG Converter Online — Free Vectorizer Studio | img.ubify

Transform PNG or JPG images into high-fidelity SVG vectors for free. Advanced path-smoothing and detail control for professional designers and developers. 100% local Wasm processing.

PNG to WebP Converter — High-Fidelity Web Optimization | img.ubify

Convert PNG to WebP while preserving transparency and reducing file size. Enterprise-grade batch processing in your browser.

Port Checker

Check if a specific port is open

Poshmark Seller Fee & Earnings Calculator

Calculate Poshmark seller fees (flat $2.95 under $15 or 20% over $15), shipping discounts, and net earnings on fashion reselling.

Post-Frame Pole Barn Wind Uplift & Footing Sizer

Client-side interactive engineering calculator for post-frame pole barn wind uplift & footing sizer. 100% private in-browser computation with zero server transit.

Pregnancy Due Date Calculator

Calculate estimated baby due date, trimester timeline, and gestational age

Pregnancy Due Date Calculator

Enter your last period date and get your full pregnancy calendar — with due date, trimester breakdown, and key milestone dates.

Pregnancy Weight Gain Calculator

Calculate recommended pregnancy weight gain based on Institute of Medicine (IOM) pre-pregnancy BMI guidelines.

Present Value (PV) Calculator

Calculate the present value of money to determine what a future sum is worth in today's dollars.

Prime Number Checker

Check if a number is prime

Print Bleed & Crop Mark Inserter

Inject professional 0.125-inch bleed margins and vector trim marks to Canva or Word PDFs to prevent commercial print shop rejection.

Print Sheet Generator — Tile Images on A4/Letter Online Free

Arrange any image into a grid for printing. Create 4-up, 10-up (business cards), or 12-up sheets on A4 or Letter sizes instantly. Download as a high-fidelity PDF.

Print-on-Demand T-Shirt & Fabric Wrinkle Displacement Mockup

Warps flat graphics and logos onto realistic fabric folds, folds shading, and wrinkles using custom displacement mapping and multiply blend modes in your browser.

Probability & Odds Calculator

Calculate probability of single events, joint probabilities (P(A and B)), and odds ratios.

Professional HEIC to JPG Converter — 100% Private Apple Photo Studio | img.ubify

Transform HEIC to high-fidelity JPG or PNG instantly. Our Wasm-based decoder preserves 10-bit/12-bit Apple color depth with zero server exposure. Batch process iPhone photos securely.

Profit Margin Calculator

Calculate gross margin, operating margin, and markup percentage on goods and services

Profit Margin Calculator

Calculate gross, operating, and net profit margins for any product or business — with benchmarks by industry to see how you compare.

Projector Throw Distance, Screen Size & Lumens Lux Sizer

Client-side interactive engineering calculator for projector throw distance, screen size & lumens lux sizer. 100% private in-browser computation with zero server transit.

Property Tax Estimator

Estimate annual and monthly property taxes by home value, state rate, and exemptions

Property Tax Estimator

Estimate your annual property tax based on home value and state — and see how it affects your total monthly housing cost.

ProRes & H.265 Video Encoding Bitrate to File Size Storage Sizer

Client-side interactive engineering calculator for prores & h.265 video encoding bitrate to file size storage sizer. 100% private in-browser computation with zero server transit.

Protect PDF

Encrypt your PDF with a password. Anyone opening the file will need to enter the password.

Punycode & IDN International Domain Converter

Convert international Unicode domains (umlauts, accents, Cyrillic, Chinese, emojis) into DNS-safe ASCII (xn--) and back with validation

Pythagorean Theorem Calculator (a² + b² = c²)

Solve the Pythagorean theorem a² + b² = c² for right triangle hypotenuse and missing leg dimensions.

Python Online Compiler & REPL

In-browser Python 3 WebAssembly REPL and online compiler powered by Pyodide with zero server execution, instant stdout, and timing

QR Code Generator

Generate QR codes from text or URLs

Quadratic Equation Solver (ax² + bx + c = 0)

Solve quadratic equations ax² + bx + c = 0 with real and complex roots, discriminant, and parabola vertex.

Quarter-Mile Elapsed Time & Trap Speed Horsepower Sizer

Client-side interactive engineering calculator for quarter-mile elapsed time & trap speed horsepower sizer. 100% private in-browser computation with zero server transit.

Quarter-Wave Monopole Ground Plane Radial Length Sizer

Client-side interactive engineering calculator for quarter-wave monopole ground plane radial length sizer. 100% private in-browser computation with zero server transit.

Random Number Generator (RNG)

Generate truly random integers between custom minimum and maximum bounds using browser crypto APIs.

Random Token Generator

Generate random tokens in various formats

Ratio & Aspect Ratio Scaler Calculator

Solve proportional ratios A:B = C:X and scale video and display aspect ratios (16:9, 4:3, 21:9).

RC Low-Pass & High-Pass Passive Filter Cutoff Sizer

Readability Score Checker

Calculate readability scores for your content

Reading Time Estimator

Estimate reading time for any text

Rebar Weight, Spacing & Concrete Grid Sizing Calculator

Client-side interactive engineering calculator for rebar weight, spacing & concrete grid sizing calculator. 100% private in-browser computation with zero server transit.

Redact PDF

Draw black rectangles over sensitive areas on any page. Redactions are permanent in the output.

Redirect Chain Checker

Check URL redirect chains and status codes

Regex Tester

Test regular expressions with real-time matching and highlighting

Rehab Cost Estimator

Estimate out-of-pocket costs for medical detox, residential inpatient, and outpatient rehab

Rehab Cost Estimator

Estimate the cost of addiction treatment programs by type, duration, and location — so finances are never a barrier to getting help.

REM Sleep Cycle & Bedtime Calculator

Calculate sleep cycles to wake up energized between 90-minute natural REM cycles rather than groggy mid-cycle.

Rent vs Buy Calculator

Compare true cumulative costs of renting vs buying with home equity and appreciation

Rent vs Buy Calculator

Find out whether renting or buying makes more financial sense for your exact situation — with a break-even timeline and 10-year cost comparison.

Rental Property Cash Flow & Cap Rate Calculator

Calculate monthly net operating income (NOI), Capitalization Rate (Cap Rate %), and Cash-on-Cash Return on real estate investment properties.

Reorder Pages

See all pages as thumbnails and drag them into your preferred order. Download the reordered PDF.

Repair PDF

Upload a potentially corrupted PDF. We'll attempt to re-parse and rebuild its structure.

Required Minimum Distribution (RMD) Calculator

Calculate mandatory IRS Required Minimum Distributions (RMD) for Traditional IRAs and 401(k) accounts based on SECURE 2.0 rules.

Resize Image to Exact MM, CM, or Inches | 300 DPI Print Studio

Resize your images to exact physical dimensions (mm, cm, in) for professional printing. Automatic DPI calculation for razor-sharp 300 DPI results. 100% private local processing.

Response Time Checker

Check response time for any URL

Restaurant Bill Split & Tip Calculator

Split dining bills and bar tabs evenly among guests with customizable tip percentages and tax.

Retaining Wall Surcharge Soil Pressure & Block Count Sizer

Client-side interactive engineering calculator for retaining wall surcharge soil pressure & block count sizer. 100% private in-browser computation with zero server transit.

Return on Investment (ROI) Calculator

Calculate return on investment (ROI) and annualized compound return across business investments, real estate, and stocks.

RF Attenuator Pi, Tee & Bridged-T Resistor Pad Calculator

Client-side interactive engineering calculator for rf attenuator pi, tee & bridged-t resistor pad calculator. 100% private in-browser computation with zero server transit.

RF Coaxial Cable Loss, VSWR & Return Loss Calculator

Convert Voltage Standing Wave Ratio (VSWR) to Return Loss (dB) and reflection coefficient (ρ). Computes matched and mismatched coaxial cable power attenuation for LMR-400, RG-58, and RG-8X from HF to 6 GHz.

RF Friis Free-Space Path Loss (FSPL) Link Budget Sizer

Client-side interactive engineering calculator for rf friis free-space path loss (fspl) link budget sizer. 100% private in-browser computation with zero server transit.

RF Power dBm to Watts & Volts Peak-to-Peak Converter

Client-side interactive engineering calculator for rf power dbm to watts & volts peak-to-peak converter. 100% private in-browser computation with zero server transit.

RF Skin Depth & AC Conductor Resistance Calculator

Client-side interactive engineering calculator for rf skin depth & ac conductor resistance calculator. 100% private in-browser computation with zero server transit.

Road Trip Fuel Cost & Gas Calculator

Calculate fuel cost for road trips based on distance, vehicle MPG, gas price, and passenger splits.

robots.txt Tester

Test and validate robots.txt rules

Roman Numeral Converter

Convert between decimal and Roman numerals

Roof Pitch Slope (X/12), Common Rafter Length & Overhang Sizer

Client-side interactive engineering calculator for roof pitch slope (x/12), common rafter length & overhang sizer. 100% private in-browser computation with zero server transit.

Room Mode Axial, Tangential & Oblique Resonant Standing Wave Sizer

Client-side interactive engineering calculator for room mode axial, tangential & oblique resonant standing wave sizer. 100% private in-browser computation with zero server transit.

Rotate & Flip Image Online — Precision Leveling & 100% Private | img.ubify

Rotate images with surgical precision (+/- 0.1°). Flip horizontally or vertically. Secure, browser-side processing for perfect image orientation.

Rotate Pages

Upload a PDF and rotate individual pages or all pages at once. Choose 90°, 180°, or 270° rotation.

Roth IRA Calculator

Project how maxing out your annual Roth IRA contributions builds tax-free retirement wealth over time.

Round Image Corners Online — Modern Aesthetic Utility | img.ubify

Give your images a premium, modern look with rounded corners. Custom radius control and instant transparent exports. 100% private and fast.

RSA Key Generator

Generate RSA public/private key pairs

Running Pace & Marathon Split Calculator

Calculate running pace per mile or kilometer, race finish times, and target splits for 5K, 10K, Half Marathon, and Full Marathon

SaaS Metrics & Rule of 40 Calculator

Calculate ARR, MRR, Customer Lifetime Value (LTV), CAC Ratio, Net Churn Rate, and your venture Rule of 40 score.

SaaS Pricing Calculator

Model subscription tiers, target MRR/ARR, and unit economics for software products

SaaS Pricing Calculator

Calculate the right price for your SaaS product based on target revenue, user count, and feature tiers — with a competitive positioning guide.

Sales Tax & Pre-Tax Price Calculator

Calculate sales tax additions or reverse calculate the original pre-tax price from a total receipt.

Sample Rate Pitch Transposer & Tape Speed Semitone Sizer

Client-side interactive engineering calculator for sample rate pitch transposer & tape speed semitone sizer. 100% private in-browser computation with zero server transit.

Sand Casting Gating Ratio & Choke Area Runner Sizer

Client-side interactive engineering calculator for sand casting gating ratio & choke area runner sizer. 100% private in-browser computation with zero server transit.

SAT to ACT Score Concordance Converter

Convert between SAT and ACT composite scores using official College Board and ACT concordance comparison tables.

Satellite Dish Azimuth, Elevation & LNB Polarization Skew Sizer

Client-side interactive engineering calculator for satellite dish azimuth, elevation & lnb polarization skew sizer. 100% private in-browser computation with zero server transit.

Saturated Steam Properties & Enthalpy Calculator

Client-side interactive engineering calculator for saturated steam properties & enthalpy calculator. 100% private in-browser computation with zero server transit.

Savings Goal Calculator

Calculate required monthly savings and timeline to reach financial goals

Savings Goal Calculator

Generic savings advice fails in 2026. Set specific milestones for emergency funds, travel, and housing with our priority-weighted goal engine.

Scanned Document Auto-Deskewer & Angle Straightener

Straighten tilted and crooked scanned documents to precise 0.1° accuracy without pixel blur or downloading third-party software.

Schema Markup Validator

Validate JSON-LD schema markup

Schengen Visa & Passport Photo Maker — Official 35x45mm Online Studio

Create compliant Schengen visa and passport photos online. Official European 35x45mm format, light background, 100% private and free.

Schengen Visa Photo Maker — Official 35x45mm Online Tool | img.ubify

Create Schengen visa photos for Europe. Official 35x45mm size, white background, and biometric compliance. 100% private.

Scientific Calculator

Full scientific calculator with advanced functions

Scientific Notation Calculator

Convert standard decimal numbers to scientific notation (a × 10^b) and engineering notation.

Screen QR Code Scanner & Decoder

Scan and decode QR codes from screen captures, uploaded images, webcam, or clipboard with 1-click URL extraction

Screenshot to Text (OCR)

Extract text from images using OCR

Security Camera & Dashcam CCTV Timestamp OSD Inpainter

Seamlessly inpaints and removes baked-in bright yellow or green OSD date/time stamps, channel overlays, and camera IDs from video frames or surveillance photos.

Sentence Counter

Count the number of sentences in text

SERP Snippet Previewer

Preview how your page appears in search results

Shaft Keyway Shear Stress & Key Length Sizer

Client-side interactive engineering calculator for shaft keyway shear stress & key length sizer. 100% private in-browser computation with zero server transit.

Sheet Metal Air Bending Press Brake Tonnage & V-Die Sizer

Client-side interactive engineering calculator for sheet metal air bending press brake tonnage & v-die sizer. 100% private in-browser computation with zero server transit.

Sheet Metal K-Factor, Bend Allowance & Blank Flat Pattern Sizer

Client-side interactive engineering calculator for sheet metal k-factor, bend allowance & blank flat pattern sizer. 100% private in-browser computation with zero server transit.

Sheet Metal Punching & Piercing Shear Tonnage Sizer

Client-side interactive engineering calculator for sheet metal punching & piercing shear tonnage sizer. 100% private in-browser computation with zero server transit.

Shielding Gas Flow Rate (CFH) & Cylinder Arc Time Sizer

Client-side interactive engineering calculator for shielding gas flow rate (cfh) & cylinder arc time sizer. 100% private in-browser computation with zero server transit.

Sign PDF

Draw, type, or upload your signature. Place it anywhere on the document.

Significant Figures (Sig Fig) Calculator

Identify significant digits, leading/trailing zeros, and round numbers to target sig fig precision.

Singapore Passport Photo Maker — Official 35x45mm ICA Online Studio

Create Singapore passport and pass photos online. ICA-compliant 35x45mm size, 400x514px digital specs, white background, 100% private.

Sleep Debt Calculator

Find out how much sleep debt you've accumulated this week and what it's costing your health, focus, and performance.

Slope & Line Equation Calculator

Calculate the slope (rise over run), angle, distance, and slope-intercept line equation between two coordinate points.

Small Claims Court Limit Checker

Find maximum dollar limits for small claims court in all 50 US states

Small Claims Court Limit Checker

Instantly find the maximum claim amount for small claims court in every US state — so you know whether your case qualifies.

Small Text Generator (Superscript, Subscript & Small Caps)

Transform normal text into tiny aesthetic Unicode fonts: superscript small text, subscript baseline letters, and small caps for Instagram bios, Discord handles, and math formulas

Small Wind Turbine Kinetic Power Output & Swept Area Sizer

Client-side interactive engineering calculator for small wind turbine kinetic power output & swept area sizer. 100% private in-browser computation with zero server transit.

Smith Chart Complex Impedance to Reflection Coefficient Converter

Client-side interactive engineering calculator for smith chart complex impedance to reflection coefficient converter. 100% private in-browser computation with zero server transit.

SMPTE 29.97 / 23.976 Drop-Frame & Non-Drop Frame Timecode Math

Client-side interactive engineering calculator for smpte 29.97 / 23.976 drop-frame & non-drop frame timecode math. 100% private in-browser computation with zero server transit.

Sobriety Calculator

Track sober days, money saved, and milestone achievements in recovery

Sobriety Calculator

Enter your quit date and see exactly how long you've been sober — in days, hours, minutes, money saved, and health milestones reached.