Is it safe to paste my JWT here?

Yes. The decoding happens entirely in your browser using JavaScript. No data is sent to any server.

Can this tool verify JWT signatures?

This tool decodes and displays JWT contents. For full signature verification, you need the signing secret or public key, which this tool does not require.

Is it safe to paste my JWT here?

Yes. The decoding happens entirely in your browser using JavaScript. No data is sent to any server.

Can this tool verify JWT signatures?

This tool decodes and displays JWT contents. For full signature verification, you need the signing secret or public key, which this tool does not require.

無料

JWTデコーダー

JWTトークンを貼り付けてヘッダー、ペイロード、有効期限を検査。すべてブラウザで実行。

100%無料登録不要ブラウザで実行

ステータス

有効

有効期限まで

1668d 23h

発行日時

2960d 15h前

ヘッダー

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

ペイロード

{
  "sub": "1234567890",
  "name": "John Doe",
  "iat": 1516239022,
  "exp": 1916239022
}

クレーム

sub"1234567890"Subject

name"John Doe"

iat1516239022Issued At

exp1916239022Expiration Time

署名

4S2sL0bGMwFk3IGSbIOAsOGSYH_B5MddO1BDLl2Yb4E

このツールはブラウザ内でトークンをデコードします。データはサーバーに送信されません。

JWT Decoderについて

Paste a JWT token to instantly decode and inspect its header, payload, and signature. View claims like expiration, issuer, and custom data. Everything runs in your browser — tokens are never sent to a server.

よくある質問

Developerツールをもっと見る

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LaunchChatはセキュアなウィジェット認証にJWTを使用しています。埋め込みセキュリティの詳細をご覧ください。

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