JWT Decoder
Decode and analyze JSON Web Tokens (JWT) for authentication and authorization systems
Security Notice: Client-side tool for privacy - never decode sensitive JWT tokens on untrusted sites. JSON Web Tokens transmit secure information between parties.
What is a JWT?
A JWT (JSON Web Token) is a compact, URL-safe token format used for securely transmitting information between parties. It typically contains a header, payload, and signature.
Why use this tool?
- ✔️ Decode JWT tokens in your browser
- ✔️ View header & payload as formatted JSON
- ✔️ 100% secure – nothing is sent to a server
- ✔️ Useful for developers, testers, and security researchers
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