JWT Decoder & Inspector
Decode and inspect JSON Web Tokens (JWT) to analyze header parameters, payload claims, token signatures, expiration dates, and issued timestamps.
Token Active
Expires: 9/26/2049, 3:17:02 AM
Issued: 1/18/2018, 1:30:22 AM
{
"alg": "HS256",
"typ": "JWT"
}{
"sub": "1234567890",
"name": "Alice Doe",
"admin": true,
"iat": 1516239022,
"exp": 2516239022
}Standard Claims Legend
Subject — Unique user ID or entity identifier
Expiration Time — Date & time when token becomes invalid
Issued At — Date & time when token was created
Code Snippets & Examples
Copy-paste ready code implementations for your project:
function decodeJWT(token) {
const [header, payload] = token.split('.').slice(0, 2);
const parsePart = (str) => JSON.parse(atob(str.replace(/-/g, '+').replace(/_/g, '/')));
return { header: parsePart(header), payload: parsePart(payload) };
}import jwt
# Decode without verification
payload = jwt.decode(token, options={"verify_signature": False})
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Preguntas Frecuentes
What is a JSON Web Token (JWT)?
A JWT is an open standard (RFC 7519) for securely transmitting information between parties as a JSON object. It consists of three Base64URL-encoded parts separated by dots: Header, Payload, and Signature.
Is it safe to paste my JWT token here?
Yes. All decoding takes place 100% locally in your browser using JavaScript. No tokens are sent to any server.