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JWT Auth System

Interactive Demo Auth Vault

JWT Token Generator & Decoder

Generate signed JWT tokens and decode/validate them — see exactly what's inside.

Generate Token

Decode Token

Subject (user ID) User Roles Algorithm Expiry Secret Key Custom Claims (JSON)

Generated Token

Click "Generate JWT" →

Decoded Payload

{}

Paste JWT Token Secret Key (for verification)

Decoded Header

{}

Decoded Payload

{}

Full version includes RS256 asymmetric signing, token refresh flow, blacklisting, Redis session store, and FastAPI/Django middleware.