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JWT Decoder
Decode and inspect JSON Web Tokens. View the header, payload, and signature.
About JSON Web Tokens
JWT (JSON Web Token) is a compact, URL-safe token format used for authentication and information exchange. A JWT consists of three parts: Header (algorithm & type), Payload (claims & data), and Signature (verification). JWTs are commonly used in OAuth 2.0, OpenID Connect, and API authentication.
How to Use
- Paste your JWT token in the input field
- The header, payload, and signature are decoded automatically
- View expiration time and other claims
- Copy decoded sections as needed
Common Use Cases
- Debugging authentication tokens
- Inspecting JWT claims and expiration
- Verifying token structure during development
- Understanding OAuth2 and API tokens
Frequently Asked Questions
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