tool.jwt.tokenLabel
ℹ️ tool.jwt.whatIs
JSON Web Token (JWT) tool.jwt.whatIsDesctool.jwt.composed
Decode and inspect JSON Web Tokens (JWT) instantly. Our JWT Decoder parses the header, payload, and signature sections, displaying all claims in a readable format.
JWTs are widely used for authentication and information exchange in modern web applications. This tool helps developers debug token issues, verify expiration dates, inspect custom claims, and understand token structure.
Paste your JWT and see the decoded content with syntax highlighting. The tool validates the token structure and warns about expired tokens or malformed data. All decoding happens locally — your tokens are never sent to any server.
Yes. All decoding happens in your browser. Your token is never transmitted to any server. However, avoid pasting production secrets in any online tool.
The tool decodes the JWT structure and displays the signature, but does not verify cryptographic signatures. Use your application's secret key for verification.