JWT Decoder — Free Online
Paste a JWT token to decode its header and payload. Check expiry date. No server upload — 100% private.
JWT Token Input
Frequently Asked Questions
Q. Is the JWT sent to a server?
No. All decoding happens locally in your browser. Your token is never sent to any server.
Q. Does the tool verify the JWT signature?
This tool decodes (parses) the JWT without signature verification. For full verification, use a server-side library.
Q. Can I check the expiry time?
Yes. The tool shows the "exp" claim as a human-readable date and tells you if the token is expired.