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JWT Builder
DataBuild and encode JSON Web Tokens with custom headers and payloads.
ttb run jwt-builder
Header (Algorithm)
Payload (Data)
Verify Signature (HS256)
HMACSHA256( base64UrlEncode(header) + "." + base64UrlEncode(payload),)
Encoded Token
■ Header■ Payload■ Signature
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如何使用 JWT Builder
Input valid JSON payloads into the Header (specifying the signing algorithm like HS256) and Payload (adding claims like user ID or expiration). Finally, provide a secret string. The tool will compute the cryptographic HMAC signature locally in your browser and output a fully valid JWT.
1
Enter your parameters
Configure the inputs for the Jwt Builder according to your specific needs.
2
View real-time results
The utility instantly processes your request and displays the calculated outputs directly in your browser.
3
Copy or Download
Click the copy icon next to the final output to instantly grab the result, or export it if applicable.
常见问题
Is this secure?+
Yes! The entire process relies on the Web Crypto API, meaning your private signature secrets and token data never leave your browser. We do not transmit or store your JWTs anywhere.
What is a JSON Web Token (JWT)?+
A JWT is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. This information can be verified and trusted because it is digitally signed.