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🎫 JWT 解码JWT Decoder
在线解析 JWT Token，查看 Header、Payload 和过期时间，本地解码不上传。Decode JSON Web Tokens to inspect header, payload and expiry, locally.
使用说明与常见问题How-to & FAQ
「JWT 解码」是什么？What is the JWT Decoder?
在线解析 JWT Token，查看 Header、Payload 和过期时间，本地解码不上传。Decode JSON Web Tokens to inspect header, payload and expiry, locally.
如何使用「JWT 解码」？How do I use the JWT Decoder?
在「JWT 解码」中，在上方填写或选择所需内容，结果会实时显示在下方；所有处理都在浏览器本地完成。In the JWT Decoder: Fill in or choose the options above and the result appears below instantly; everything runs locally in your browser.
会验证签名吗？Does it verify the signature?
不会，本工具只解码内容。签名验证需要密钥，请在服务器端进行。No, it only decodes. Signature verification needs the secret/key and should be done server-side.
编码和加密有什么区别？Is encoding the same as encryption?
编码（如 Base64、URL 编码）可直接还原，不提供保密性；加密需要密钥。「JWT 解码」的处理全部在本地完成。No. Encoding (Base64, URL…) is reversible by anyone; encryption needs a key. The JWT Decoder works fully offline in your browser.
「JWT 解码」免费吗？需要注册吗？Is the JWT Decoder free? Do I need an account?
「JWT 解码」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The JWT Decoder is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.