JWT Decoder

Free online JWT decoder. Instantly decode and inspect JSON Web Tokens — view header, payload claims, expiry, and verify token structure. No data sent to server.

JWTPopular
JWT Token
Ready

You might also like

JSON Validator
Free online JSON validator. Instantly validate JSON syntax and structure with detailed line-level error messages. Check if your JSON is valid in seconds.
JSONPopular
HTML Validator
Free online HTML validator. Check HTML markup against W3C standards and detect errors, warnings, and accessibility issues. Instant client-side validation.
HTML
CSS Validator
Free online CSS validator. Instantly check CSS stylesheets for syntax errors, invalid properties, and browser compatibility issues. No sign-up required.
CSS
YAML Validator
Free online YAML validator and linter. Instantly validate YAML files for syntax errors, indentation issues, and structural problems. Perfect for CI/CD configs.
YAML

Frequently Asked Questions

Is it safe to paste my JWT here?

Yes. JWT decoding happens entirely in your browser. No data is sent to any server, making it completely private and secure.

Does it verify the JWT signature?

The decoder decodes and displays the JWT contents. Signature verification requires the secret key, which is not needed for inspection.

What information can I see in a decoded JWT?

You can see the header (algorithm, token type), payload (claims like sub, iat, exp, roles), and the signature section.