JWT Decoder
Decode the header and payload of a JSON Web Token (JWT) in your browser. Your tokens never leave your device — no uploads, no sign-up.
JSON Web Token
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About this tool
Decode a JSON Web Token to inspect its header and payload claims, all locally — your token is never sent anywhere.
Common use cases
- Check the claims and expiry of an auth token
- Debug why a token is rejected
- Verify the issuer and audience of a JWT