JWT Decoder
Decode JWT tokens and inspect claims
100% client-side. Your tokens never leave your browser.
About this tool
Decode JWT (JSON Web Token) headers and payloads. Inspect claims, expiration times, and signatures. All decoding happens locally - your tokens never leave your browser.
Frequently Asked Questions
Is it safe to paste JWT tokens?
Yes, decoding happens entirely in your browser. Your tokens are never sent to any server. However, do not share tokens publicly as they may contain sensitive information.
What are JWT tokens?
JWT (JSON Web Token) is a compact, URL-safe means of representing claims between parties. Commonly used for authentication in web applications.