Question 1

How do I decode a JWT token online safely?

Accepted Answer

Paste your JWT into the input field and our tool instantly decodes the header and payload in your browser. No data is sent to any server, keeping your tokens completely private.

Question 2

What are the three parts of a JWT?

Accepted Answer

A JSON Web Token consists of three Base64Url-encoded parts separated by dots: the header (algorithm and token type), the payload (claims), and the signature used to verify the token.

Question 3

Can this tool verify JWT signatures?

Accepted Answer

This tool decodes and displays the header and payload but does not verify the cryptographic signature. Signature verification requires the secret key or public certificate used to sign the token.

Question 4

What is a JWT expiry claim?

Accepted Answer

The "exp" claim in a JWT payload specifies the expiration time as a Unix timestamp. Tokens received after this time should be rejected by your server. Use our tool to inspect exp values quickly.

JWT Decoder | Free Online JSON Web Token Inspector

JWT Token

✓ Valid JWT structure

Online JWT decoder tool

JWT Token

✓ Valid JWT structure