JWT Builder
NewCreate and sign JWT tokens — set header, payload, and secret to generate a valid token.
Token Breakdown
HMAC-SHA256(base64url(header) + "." + base64url(payload), secret)
⚠️ This tool generates tokens for testing only. For production use a proper server-side JWT library. The secret key is never sent anywhere — everything runs in your browser.
Frequently Asked Questions
How do I make a build request with this tool?
Enter the API endpoint URL, choose the build HTTP method, add any required headers or body parameters, and click Send. The response — including status code, headers, and formatted body — is displayed immediately.
What HTTP methods are supported?
The tool supports all standard HTTP methods: GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS. Select the desired method from the dropdown before sending your request.
Can I set custom headers?
Yes. You can add any number of custom request headers using the headers panel. Common headers like Authorization, Content-Type, and Accept are available as pre-populated suggestions for convenience.
Does this tool support authentication?
Yes. The tool supports Bearer token, Basic Auth, and API key authentication patterns. Add the appropriate Authorization header or use the built-in auth helper to configure credentials quickly.
Are my API requests logged?
No. All requests are made directly from your browser via the Fetch API. No request URLs, headers, bodies, or responses are logged or stored on any server.
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