JWT Decoder
Instantly decode a JWT's header and payload.
100% private - files never leave your browser
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Inspect a JSON Web Token (JWT) without any tools or servers. Paste a token and instantly see its decoded header and payload as formatted JSON, which is invaluable when debugging authentication. Note that decoding does not verify the signature. Everything runs in your browser, so your token is never transmitted.
How to use JWT Decoder
- 1
Paste your JWT.
- 2
View the decoded header and payload.
- 3
Copy any part you need.
Frequently asked questions
No. It only decodes the token so you can read it. Signature verification needs your secret key and should be done server-side.