Developer
JWT Decoder
Paste a JSON Web Token to instantly decode its header and payload and check the expiry. A private JWT decoder that runs in your browser — tokens are never sent to a server.
100% free · runs in your browser · nothing is uploaded.
Why use this tool
- 100% free, forever
- No sign-up or login
- Runs entirely in your browser
- Your files never leave your device
- Unlimited use, no watermarks
- Works on desktop and mobile
How to use JWT Decoder
- 1
Paste your JWT.
- 2
Read the decoded header and payload.
- 3
Check the expiry and copy any part you need.
Paste a JSON Web Token to read its header and payload and check the expiry. Decoding only — the signature is not verified and nothing is sent anywhere.
Frequently asked questions
No — this is a decoder only. It reads the header and payload but does not validate the signature.