Decode JSON Web Tokens (JWT) to read the header, payload and expiry – privately in your browser.
What is the JWT Decoder?
A JWT (JSON Web Token) has three parts: header, payload and signature. This decoder shows the header and payload as readable JSON and turns iat/exp timestamps into dates so you can check if a token has expired. The token never leaves your browser.
How to use the JWT Decoder
- Paste your JWT.
- Read the decoded header and payload.
- Check the issued and expiry dates below.
Frequently asked questions
Does it verify the signature?
No. It only decodes. Signature verification needs the secret or public key and should be done on your server.
This jwt decoder is 100% free, needs no signup and runs in your browser, so your data stays private.
Last updated: · By NodifyTech