JWT Decoder & Parser Online

Decode and inspect JWT tokens instantly

Security Note

This tool only decodes JWT tokens - it does not verify signatures. Never trust decoded data without server-side verification. All processing happens locally in your browser.

ALGORITHM & TOKEN TYPE 
Header will appear here...
DATA 
Payload will appear here...
VERIFY SIGNATURE 
Signature will appear here...

About JWT Decoder

What is JWT?

JSON Web Token (JWT) is an open standard (RFC 7519) for securely transmitting information between parties as a JSON object. JWTs are commonly used for authentication and authorization.

JWT Structure

Header: Algorithm & token type
Payload: Claims (data)
Signature: Verification

Common Claims

  • iss - Issuer
  • sub - Subject
  • aud - Audience
  • exp - Expiration time
  • iat - Issued at
  • nbf - Not before
Note: This tool only decodes JWTs. It does not verify signatures.

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