JWT Token Viewer
About JWT Tokens
- JWT tokens consist of three parts: header, payload, and signature
- The header typically contains the signing algorithm used
- The payload contains the claims (data)
- Common claims include: exp (expiration), iat (issued at), sub (subject)
- The signature is used to verify the token's authenticity
About this Tool
This JWT Token Viewer is a client-side tool that helps developers inspect and verify JWT tokens. All processing happens in your browser - no tokens are sent to any server.
- Decode and inspect JWT tokens
- Verify signatures using HMAC algorithms (HS256, HS384, HS512)
- Check token expiration status
- View decoded header and payload data
- Copy individual components for further analysis