JWT Decoder

Decode JSON Web Tokens and inspect claims

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참고: 아래 툴 인터페이스는 현재 영어로만 제공됩니다. UI는 하나씩 번역 중입니다. 이 툴을 영어로 보기 →

JWT token

사용법

1
Paste your JWT
Drop the token (header.payload.signature) into the input box.
2
Inspect the header and payload
The three base64url segments are decoded and formatted as JSON.
3
Check the claims
Standard claims like exp, iat, nbf are shown with human-readable dates and an expired/valid badge.

JWT Decoder 소개

Free online JWT decoder. Paste any JSON Web Token to decode the header, payload, and signature. See standard claims (iss, sub, exp, iat) formatted with human-readable timestamps and an expiry indicator. All decoding happens in your browser. 712 Tools의 JWT Decoder은 최신 JavaScript API를 사용해 여러분의 browser에서 완전히 동작합니다 - server가 여러분의 데이터를 볼 일이 절대 없습니다. 즉, 즉각적인 결과, 완전한 프라이버시, 그리고 업로드 제한이 없습니다.

debugging 세션, 빠른 sanity check, 또는 프로덕션 인시던트 - 어떤 상황이든 이 툴은 원하는 만큼 무료로 사용할 수 있습니다. 워터마크 없음, 가입 없음, 툴 내 광고 없음.

자주 묻는 질문

Does it verify the signature?

No. This tool only decodes the token - verifying signatures requires the secret or public key, which should never be pasted into a public web tool.

Is my token uploaded?

Never. All base64url decoding happens locally in your browser. Nothing is stored, logged, or sent.

Is it safe to paste production tokens?

Because decoding happens locally, yes - no network request is made. Still, treat any browser tool with care and prefer a local CLI for the most sensitive tokens.

What algorithms are supported?

The header shows any 'alg' value. Decoding is algorithm-independent since it only parses the base64url segments.

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