JWT Decoder
Decode JSON Web Tokens (JWT) safely and securely in your browser. Free online developer tool with no server-side tracking.
Encoded JWT
Decoded Token Data
Paste a JWT token on the left to see the decoded header and payload.
Free JWT Decoder
JSON Web Tokens (JWT) are an open standard used to share security information between two parties. This free online tool allows you to decode JWTs securely entirely within your browser. **Your token is never sent to any server.**
How to Use It
Paste a JWT into the input field and its header and payload are decoded and displayed instantly.
Example
Pasting a JWT reveals its header (algorithm and token type), payload (claims like user ID or expiry), and signature — decoded into readable JSON.
Common Use Cases
- Debugging authentication issues by inspecting a JWT's claims.
- Checking a token's expiry time or user data during development.
FAQs
Does this verify the token's signature?
No — this tool decodes and displays the header and payload only; it doesn't verify the signature against a secret or public key.