JWT

Decode and inspect JWT tokens

About this tool

Decode JWT (JSON Web Token) tokens to inspect the header and payload without external tools. Paste the token and see the decoded information instantly.

Useful for debugging authentication, checking claims (exp, iss, sub) and understanding a token's contents. Decoding is done in the browser.

How to use

Paste the JWT token into the text area.
See the decoded header and payload.
Copy the parts you need.

Frequently asked questions

Is the JWT validated/signed here?

The tool decodes and shows the contents; signature verification depends on the issuer's secret key.

Is it safe to paste my token?

Decoding happens locally in your browser; even so, avoid sharing production tokens.

What's inside a JWT?

Three parts: header, payload (claims) and signature, separated by dots.