JWT Encoder
Build and HMAC-sign a JSON Web Token in the browser.
The reverse of the JWT Decoder: build a JSON Web Token from a header and a payload, sign it with HMAC, and get the signed token back. Everything runs in your browser with WebCrypto — the secret never leaves the page.
Never sign a real token with a production secret in a browser tool — for anything real, sign on your server. none means no signature at all and is rejected by every real verifier.
使用方法
- 一切都在您的浏览器本地运行：不会上传任何数据，无需账户。
关于
Paste a header and a payload, choose HS256, HS384 or HS512, and get a signed token back. The secret is used locally with WebCrypto and is never transmitted anywhere.
Tokens are signed with HMAC, the family of algorithms used for symmetric shared-secret tokens. The "none" option produces an unsigned token for debugging only — every real verifier rejects it.
一切都在您的浏览器本地运行：不会上传任何数据，无需账户。
Embed this tool
Customize and copy an iframe. Linking back helps both sites.