What Is JWT Decoder?

JWT Decoder is an online tool for decoding and inspecting JSON Web Tokens (JWT). It helps you view the header, payload, and signature of JWT tokens, check expiration times, and understand token structure.

How To Use This JWT Decoder

1. Paste your JWT token into the input field
2. The decoder automatically decodes the token
3. View the header section (algorithm, token type)
4. Inspect the payload (claims, expiration, issuer)
5. Check the signature section
6. Verify token expiration status

Key Features

• Decode JWT tokens instantly
• View header, payload, and signature
• Syntax highlighting for JSON
• Check token expiration
• Display all claims and metadata
• Supports all JWT algorithms
• Privacy-focused: no data storage

Who Can Use This Tool?

• Backend developers debugging authentication
• Frontend developers working with auth tokens
• Security engineers auditing tokens
• API developers testing endpoints
• Students learning about JWT

Common Use Cases

• Debugging authentication issues
• Inspecting API authentication tokens
• Verifying JWT token structure
• Checking token expiration
• Understanding JWT claims
• Learning JWT specification
• Testing authentication workflows