🔐 JWT Decoder
Decode and inspect JWT (JSON Web Token) header, payload, and signature
Input JWT Token
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About JWT Decoder
JWT (JSON Web Token) Decoder is a tool that helps you decode and inspect JWT tokens. JWTs are commonly used for authentication and information exchange in web applications. This tool allows you to view the header, payload, and signature of any JWT token.
Features
- ✓Decode JWT header to see algorithm and token type
- ✓View payload claims and data
- ✓Display signature (base64 encoded)
- ✓Validate JWT structure and format
- ✓Works offline - tokens are decoded in your browser
- ✓Does not verify signatures (server-side operation)
How to Use
- 1.Paste your JWT token in the input box
- 2.The token will be automatically decoded
- 3.View the header, payload, and signature in separate sections
- 4.Note: This tool only decodes JWTs, it does not verify signatures
⚠️ Security Note
This tool only decodes JWTs - it does not verify signatures. Never trust a JWT without verifying its signature on your server. JWT tokens can be decoded by anyone, but only valid signatures prove authenticity.