JWT Token Debugger

Decode and inspect JSON Web Token headers, claims, and expiry timestamps.

Encoded JSON Web TokenPaste JWT string

HeaderPayloadSignature

Issued At (iat)

Thu, 18 Jan 2018 01:30:22 GMT

Expiration (exp)

Sat, 21 Sep 2030 16:37:02 GMT

Token Validity Status

Active (Not Expired)

Decoded Header (Algorithm & Token Type)

header.jsonjson

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

Decoded Payload (Claims & Subject Data)

payload.jsonjson

{
  "sub": "1234567890",
  "name": "Daniel",
  "admin": true,
  "iat": 1516239022,
  "exp": 1916239022
}

Overview & Usage Guide

What is this tool used for?

This tool is specifically engineered to streamline and accelerate workflows in Security & Cryptography. It runs directly inside your browser sandbox with zero external server dependencies, guaranteeing total data security and instantaneous execution.

Key Features & Capabilities

Sub-millisecond execution powered by modern browser client-side runtimes.
100% private & secure — zero logs, zero external API tracking.
Responsive interface built for Mobile, iPad, Tablet, and Desktop displays.
One-click instant copy, formatting, and file export support.