Decode JSON Web Tokens (JWT) to view their header, payload, and signature. Inspect token claims, check expiration dates, and verify token structure. No data is sent to any server.
This tool is 100% client-side. Your JWT token is decoded locally in your browser and is never transmitted. Use this to debug and inspect tokens, not to verify cryptographic signatures.
sub — Subject (user ID)exp — Expiration timeiat — Issued at timeiss — Issueraud — AudienceFree online JWT decoder and inspector. View token header, payload claims, and signature. Check expiration dates and token validity. 100% client-side — no data transmitted. Essential for API developers and security engineers.