JWT Tool
Payload Claims
Token
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Payload
Technical Guide
How the JWT Simulator Works
The JWT Simulator allows you to generate and decode JSON Web Tokens (JWTs) directly in your browser. It helps developers understand token structure, verify signatures, and debug authentication flows.
1
Generate Tokens
Create custom JWTs by defining claims, signing algorithms (HS256), and secret keys. Visualize the resulting token structure immediately.
2
Decode & Verify
Paste an existing token to decode its header and payload. Provide a secret key to verify the signature and ensure token integrity.
3
Client-Side Privacy
All operations happen locally in your browser. Your secret keys and tokens are never sent to a backend server.
