JWT Decoder & Inspector
Decode and inspect JSON Web Tokens. View the header, payload, and check expiration status without any external libraries.
JWT Token
Frequently Asked Questions
›How do I decode a JWT token?
Paste the full JWT (the three dot-separated parts) into the input field. The header and payload are decoded and displayed as formatted JSON instantly.
›Can this verify JWT signatures?
This tool decodes and inspects JWTs — it shows the header (algorithm, type) and payload (claims, expiration). Signature verification requires the signing key, which should never be entered in a browser tool.
›How do I check if a JWT is expired?
The tool automatically reads the 'exp' claim and shows whether the token is expired or still valid, along with the exact expiration date and time.
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