JWT 解码器

Decode and inspect JWT (JSON Web Token) tokens instantly with our free JWT Decoder. See the header, payload, and signature sections in a readable format. This is an essential tool for developers debugging authentication systems, inspecting API tokens, and learning how JWTs work.

使用方法

1. 1Paste your JWT token into the input field.
2. 2Click "Decode" to parse the token.
3. 3View the Header, Payload, and Signature sections separately.
4. 4Check expiration time (exp), user ID, roles, and other claims in the payload.
5. 5Use the information to debug authentication issues.

功能特点

• ✓Decodes JWT header, payload, and signature
• ✓Displays decoded payload as formatted JSON
• ✓Shows expiration time in human-readable format
• ✓Runs entirely in your browser — token never leaves your machine
• ✓Supports all standard JWT algorithms

常见问题