Free online JWT decoder. Decode and inspect JSON Web Tokens instantly. View header, payload, and signature. Perfect for debugging authentication and API tokens.
Paste your JWT token (e.g., eyJhbGciOi...) into the input field.
Click Decode to instantly see the header, payload, and signature of your token.
Review the decoded claims like iss, sub, exp, iat. Check token expiration and user information.
Q: Is it safe to decode JWT here?
A: Yes. All decoding happens in your browser. Your tokens are never sent to any server.
Q: What are JWT claims?
A: Claims are key-value pairs in the payload like iss (issuer), sub (subject), exp (expiration), and iat (issued at).
Q: Can I verify the signature?
A: This tool decodes the token but does not verify cryptographic signatures. Use jwt.io or backend libraries for verification.