JWT 디코더

JWT 헤더와 페이로드를 브라우저 안에서 안전하게 확인합니다.

브라우저에서만 처리무료회원가입 없음

JWT Token

Header

alg: "HS256"

typ: "JWT"

Payload

sub: "1234567890"

name: "John Doe"

iat: 1516239022(1/18/2018, 1:30:22 AM)

Signature

SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c

서명 검증은 서버 사이드에서만 가능 (HMAC 키 또는 RSA 공개키 필요).

How to use this tool well

Use this decoder to inspect JWT headers and payload claims before debugging authentication, expiry, audience, issuer, or role problems.

Paste the token and compare exp, iat, aud, iss, and role claims against the application you are testing.
Do not treat decoded text as proof that a token is valid; signature verification still belongs in your backend.
If the payload looks wrong, regenerate the token from the identity provider instead of editing claims by hand.