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JWT Decoder

Decode tokens locally and inspect claims, header, and signature segments quickly.

JWT tools

JWT Decoder

Decode header, payload, and signature locally. Useful for API debugging, auth inspection, and token review.

Segments

3

Algorithm

HS256

Type

JWT

Status

Decoded

JWT Input

Decoded Header

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

Decoded Payload

{
  "sub": "1234567890",
  "name": "MyTools",
  "role": "developer",
  "iat": 1516239022
}

Claims Overview

IssuerNot provided
Issued at1/18/2018, 1:30:22 AM
Expires atNot provided
SignaturePresent

Signature Segment

SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c

About JWT Decoder

JWT inspection helps troubleshoot authentication flows and authorization bugs. This screen lets you decode token content and verify claim values without switching tools.

What is a JWT?

A JSON Web Token (JWT) is a compact token format used to transfer authenticated claims between systems, usually containing a header, payload, and signature.

Frequently Asked Questions

Can this verify JWT signatures?

This screen is optimized for decoding and inspection. Signature validation depends on algorithm and key workflows.

What token parts are shown?

The tool displays header, payload claims, and signature segments in a readable format.

Is token data private?

Yes. Decoding runs in your browser, so token content is not uploaded by default.

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