Free Response Time Checker — Test Server Speed Online
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About This Tool
The Response Time Checker measures the time-to-first-byte (TTFB) for any URL — showing how quickly the server responds to an HTTP request. TTFB is a key performance indicator and a ranking signal for Google. Enter a URL and get the response time in milliseconds. Free, no account needed.
How to Use
- 1
Enter the full URL you want to test.
- 2
Click Test — the response time in milliseconds appears within seconds.
- 3
Compare against the recommended TTFB of under 200ms for optimal performance.
Frequently Asked Questions
What is a good TTFB (time to first byte)?
Google recommends TTFB under 200ms. Above 600ms is considered slow and negatively impacts Core Web Vitals.
Does this measure load time or server response time?
It measures server response time (TTFB) only — not full page load time including images, CSS, and JavaScript assets.
Is this response time checker free?
Yes. Completely free with no account required.