Does it verify the signature?

No. Verification needs your secret or public key, and we will never ask you to paste a signing key into a website.

Is my token sent anywhere?

No. Decoding is pure JavaScript in your tab.

Developer Utilities

JWT (JSON Web Token) decoder

Paste a token to split it into header, payload and signature. Registered claims such as exp, iat, nbf and aud are rendered as local dates so you can spot an expired session immediately.

Frequently asked questions

Does it verify the signature?: No. Verification needs your secret or public key, and we will never ask you to paste a signing key into a website.
Is my token sent anywhere?: No. Decoding is pure JavaScript in your tab.