JWT Decoder

Decode JWT header and payload JSON without verifying or sending the token.

Runs in your browser
No account
Clear output

Input

Paste or edit input, then run the tool.

How to use

Paste a JWT token (header.payload.signature).
Click Run to decode the header and payload.
Review the JSON content and expiry note; the signature is not verified.

Examples

Inspect a JWT token's payload without a server.
Check token expiry during API debugging.

FAQ

Is JWT Decoder free to use?

Yes. The page is designed as a free, lightweight utility with non-intrusive ads instead of accounts or paywalls.

Does this tool upload my files or text?

No. The core work runs in your browser, so files and text do not need to leave your device. See the privacy page for broader site details.