Decode JSON Web Tokens Online for Free

The JWT Decoder allows you to instantly view the header and payload data contained within any JSON Web Token — perfect for developers debugging authentication flows or verifying token claims without needing dedicated software. It breaks down the token structure and presents the JSON data in a clean, readable format. This tool is free, secure, and processes everything locally to keep your secrets private.

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   Paste your JWT (the full eyJ... string) into the input field.

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   The header

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   payload

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   and signature are decoded and displayed separately.

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   Inspect the claims

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   expiry

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   and algorithm in the formatted JSON output.

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   Paste your encoded JWT string into the input field.

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   The payload and header data will appear automatically in the output area.

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    Review the claims

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    expiration times

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    and algorithm details securely.

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    Review the claims, expiration times, and algorithm details securely.

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    Can this JWT decoder see my token secret?

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    No. This tool only decodes the public header and payload portions of the token. It does not verify the signature and cannot see your secret key.