JWT Decoder
在线 JWT 解码器
Parse and view the contents of JSON Web Tokens instantly. 快速解析并查看 JSON Web Token 的头部与负载内容。
Token Input / 输入 JWT
Decoded Data / 解码内容
HEADER (Algorithm & Token Type)
PAYLOAD (Data Claims)
What is a JWT?
A JSON Web Token (JWT) is a compact, URL-safe token format used for authentication and information exchange. It consists of three Base64URL-encoded parts: header, payload and signature.
Important
This decoder does not verify signatures. Do not paste production-sensitive tokens on untrusted websites.
Privacy
This tool runs locally in your browser. Your JWT is never sent to any server.
FAQ
Does this tool verify JWT signatures?
No. This tool only decodes the header and payload. It does not verify cryptographic signatures.
Is my token uploaded?
No. Decoding happens entirely in your browser. Your token never leaves your device.
Is it safe to paste production tokens?
While this tool runs locally, avoid pasting production tokens on any website as a security best practice.