Does it verify the JWT signature?

No. This tool only decodes (Base64 decodes) the header and payload sections for inspection. Signature verification requires the secret key or public certificate, which you should never share with a web tool.

Is it safe to paste my JWT here?

Tokens are decoded entirely in your browser — nothing is sent to a server. However, JWTs often contain sensitive user data, so use caution and consider using a test token.

JWT Decoder

Decodes JSON Web Tokens (JWT) and displays the header, payload, and signature sections in a readable format. Automatically parses standard claims (iss, sub, aud, exp, iat, nbf) and shows whether the token is expired or not yet valid. Note: this tool decodes only — it does not verify the signature.

JWT Token

This tool only decodes the token — it does not verify the signature. Never paste production JWTs into third-party tools.

Paste your JWT and instantly inspect the token contents — useful for debugging authentication issues.

Frequently Asked Questions

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