開發輔助
JWT Tool
Decode, sign, and verify JWT tokens locally.
浏览器内处理即时输出本地数据
權杖在瀏覽器本地簽章,請勿外洩金鑰。
演算法
HS256
主旨
toolgrid
過期時間
2026/12/11 下午11:00:00
為什麼用這個工具
03Inspect JWT claims, build HS256-signed tokens, and verify signatures in the browser.
JWT Tool combines decode, build, and verify in one place.
Sign tokens with HMAC-SHA256 and verify signatures locally without sending secrets to a server.
怎麼使用
03複製前快速檢查
03先确认输入格式符合你的预期。
在把结果用于文档、链接、配置或消息前快速扫一眼。
只复制你真正需要的输出。
常見問題
03
Does the Decode tab verify signatures?
No. The Decode tab only inspects claims. Use the Verify tab to check signature validity.
Which algorithm does the Build tab use?
HS256 (HMAC-SHA256). The header is always set to alg: HS256, typ: JWT.
Are secrets sent to a server?
No. All signing and verification runs in your browser using the Web Crypto API.
相關工具
03JSON Formatter→
Format, minify, and validate JSON in one place.
Base64 Encode / Decode→
Convert plain text to Base64 and back.
Hash Generator→
Generate SHA-1, SHA-256, and SHA-512 hashes.