Developer & Tech
JWT Token Decoder
Inspect JWT header and payload claims locally without verification.
JWT decoder
Inspect header and payload claims locally
Decoding does not verify the signature or prove that the token is trustworthy.
Common questions
Good to know
Does this tell me whether a JWT is valid?+
No. It decodes the readable sections only and does not verify the cryptographic signature.
Is the token sent to a server?+
No. Decoding runs in your browser, but you should still prefer redacted or expired test tokens.
More tools
View all developer & tech toolsPrivacy and quick tips +
This tool runs in your browser. Your input is not stored or sent to us.
- Never paste a live session token into an untrusted page.
- Decoding is not signature verification.
- Check exp, nbf, iss and aud in the real verifier.