JWT 解析器
解码和检查 JSON Web 令牌（JWT），具有实时验证功能。在浏览器中安全地查看头部、载荷和签名信息。
Header
Payload
Signature
Algorithm
Invalid Token
How to Use the JWT Parser
Paste Token
Paste your JWT token in the input area
Auto Decode
Token automatically decodes on paste
Inspect Parts
View header, payload, and signature data
Check Status
Verify token validity and expiration time
Understanding JWT Tokens
What is a JWT?
JSON Web Token (JWT) is a compact, URL-safe means of representing claims to be transferred between two parties. It consists of three parts: header, payload, and signature, separated by dots and base64url encoded.
- • Header: Contains token type and signing algorithm
- • Payload: Contains claims or user data
- • Signature: Verifies token wasn't tampered with
- • Stateless: No server-side session storage needed
Why Parse JWTs?
JWT parsing is essential for debugging authentication issues, verifying token contents, checking expiration times, and understanding what data is being transmitted in tokens.
- • Debugging: Inspect token contents during development
- • Security: Verify token structure and claims
- • Expiration: Check token validity period
- • Development: Understand authentication flow
Instant Decoding
Auto-decode JWT on paste with color-coded sections.
100% Private
All decoding happens in your browser. Tokens never leave your device.
Completely Free
No registration or limits. Parse JWT tokens freely anytime.
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