JWT Token Decoder – Safe, Offline JSON Web Token Parser
JSON Web Tokens (JWT) are a compact way of securely transmitting information between parties as a JSON object. Often used in modern web authentication systems, JWTs are composed of three parts: Header, Payload, and Signature — each Base64URL-encoded. This tool decodes JWTs entirely client-side, ensuring your sensitive tokens are never sent to a server.
This decoder is designed for developers, testers, and security professionals who need to inspect tokens quickly. Whether you’re debugging OAuth flows, examining ID tokens, or verifying embedded claims, this offline decoder displays your JWT parts in an easy-to-read format — safely, securely, and instantly.
🔐 JWT Token Decoder
What is This?
Decode your JSON Web Tokens (JWT) safely and offline. Enter your token below to view its header and payload. This tool never sends your token to any server — all parsing is done in your browser.
Use Cases
Use this tool to inspect identity claims, verify expiration, and debug OAuth2/OpenID flows. Fast and secure for developers & testers.
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