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Decode JWT tokens online for free. View JSON Web Token contents. Verify signatures and claims.
JSON Web Tokens (JWT) are a compact, URL-safe means of representing claims to be transferred between two parties. This tool decodes JWTs to inspect their header and payload contents, and can verify signatures.
Header
Contains token type and signing algorithm
Payload
Contains claims (user data and metadata)
Signature
Verifies the token hasn't been altered
Security: This decoder runs entirely in your browser. No data is sent to any server.
Copy the JWT from your application and paste it
See header, payload, and signature sections
Review expiration, issuer, subject, and custom claims
Check if the JWT format is valid
Copy the JWT from your application and paste it
See header, payload, and signature sections
Review expiration, issuer, subject, and custom claims
Check if the JWT format is valid
JWT (JSON Web Token) is a compact, URL-safe token format used for securely transmitting information between parties.
No, this is a decoder only. It shows token contents but does not validate cryptographic signatures.
Only paste tokens from development/testing environments. Never paste production tokens containing sensitive data.
Header (algorithm and type), Payload (claims and data), and Signature (cryptographic signature).