JWT Decoder & Token Validator
Decode JSON Web Tokens (JWT) safely. Inspect token headers, payloads, claims, signatures, and verify expiration details locally in your browser.
🔑 JWT Token
Paste a JWT token to decode
📖 How to Use
Copy your JSON Web Token (JWT) string. Paste it into the input area. The tool will parse and split it into Header, Payload, and Signature components automatically, validation checking structure correctness, algorithms, and key claims.
🛡️ Why Use This Tool
Tokens contain credentials and information regarding authentication and user authorization (claims). Decoding them lets developers verify what data is passed back and forth between API clients and servers. This tool parses token structures 100% locally in your browser, maintaining absolute data privacy.
Frequently Asked Questions
No. The decoding is computed locally using pure Javascript. Your secrets and payload signatures remain securely inside your web browser.