JWT Decoder
Decode and inspect JWT tokens.
Runs entirely in your browserNo file uploadsPrivacy-first
TL;DR
Paste a JWT to decode it instantly. View header, payload, and verify structure. Works offline.
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What is JWT Decoder?
JWT Decoder parses JSON Web Tokens and displays the header and payload in a readable format.
When Should You Use This Tool?
Use when debugging authentication, inspecting tokens, or understanding JWT structure.
How to Use JWT Decoder
- 1Paste your JWT token.
- 2View the decoded header and payload.
- 3Check expiration and claims.
How Does This Tool Work?
Splits the JWT, base64-decodes each part, and displays the JSON. No verification happens locally.
Privacy Note: Runs entirely in your browser. Your data never leaves your device. No file uploads to any server.
Common Use Cases
Developers
Debug authentication tokens.
Security
Inspect token claims.