UtilPilot
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JWT Decoder

Decode JSON Web Token headers and payloads in your browser.

Decoded token

Decoded header and payload

Header

{
  "alg": "HS256",
  "typ": "JWT"
}

Payload

{
  "sub": "utilpilot-demo",
  "name": "UtilPilot",
  "iat": 1715644800
}
Signature segment: demo-signature

About JWT decoding

JSON Web Tokens are commonly used to carry signed claims between systems. A token usually contains a header, payload, and signature, separated by dots.

This decoder reads the header and payload segments so you can inspect claims such as subject, issuer, audience, and timestamps.

Common uses

  • Inspect token claims during development
  • Read header algorithm and token type
  • Debug OAuth and API authentication flows
  • Check timestamp fields before writing code

Notes

Decoding is not verification. This tool does not check signatures, trust, expiration, or issuer validity. Never paste production secrets or private tokens into tools you do not control.