JWT Parser

This tool decodes tokens only and does not verify signatures.

JWT Token

Header (JSON)

Payload (JSON)

Signature

Decode JWT headers and payloads online

Use this free JWT parser to inspect token headers, payload claims, and signatures directly in your browser. It is useful for debugging authentication flows, checking claim values, and understanding token contents without sending them to a server.

Common JWT tasks

Inspect claims during auth debugging

Decode access tokens to quickly check subject, issuer, audience, expiration, and custom claims during login or API troubleshooting.

Verify token structure before deeper checks

Confirm that header and payload sections are valid JSON and see whether the token shape matches what your app expects.

Review tokens without writing throwaway code

Paste a token and inspect its contents immediately instead of opening a console or writing temporary parsing scripts.

JWT parser FAQ

Does this tool verify JWT signatures?: No. This page decodes JWT parts for inspection only. It does not validate signatures or prove that a token is trustworthy.
Is my token sent to a server?: No. JWT decoding happens in your browser, so the token you paste is not uploaded by the tool itself.
When should I use this JWT parser?: Use it when you need to inspect claims, timestamps, or token structure during development, testing, support, or auth debugging.

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