JWT Decoder
Decode and inspect JSON Web Tokens instantly. View header, payload, signature, and check token expiration. Perfect for debugging authentication issues.
Features
- •Header & Payload Viewer
- •Expiration & Signature Insight
Best for
- •Authentication Debugging
- •API Testing
JWT Decoder
Inspect JSON Web Tokens instantly: header, payload, standard claims, and expiration—entirely in your browser.
JWT Decoder & Validator
Decode and validate JSON Web Tokens. View header, payload, and check expiration.
Enter a JWT token to decode and validate its contents
About JWT Tokens
JSON Web Token (JWT) is an open standard for securely transmitting information between parties as a JSON object.
A JWT consists of three parts separated by dots (.): header.payload.signature
- Header: Contains the token type and signing algorithm
- Payload: Contains the claims (user data, expiration, etc.)
- Signature: Used to verify the token hasn't been tampered with
Note: This tool only decodes and displays JWT contents. It does not verify the signature. For production use, always verify tokens with the secret key on your server.
Works well with
Pair with our Hash Generator, Base64 Encoder, and JSON Formatter for API and auth debugging in the browser.
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