Question 1

What is the API Request Builder?

Accepted Answer

The API Request Builder is a free online tool that lets you build and send HTTP requests directly from your browser. It supports GET, POST, PUT, DELETE, PATCH, HEAD, and OPTIONS methods with headers, authentication, query parameters, and request body. You can view the response status code, headers, body, and timing.

Question 2

Does this tool actually send HTTP requests?

Accepted Answer

Yes, unlike code generators, this tool actually sends real HTTP requests using the browser's Fetch API. You will see the actual response from the server including status code, response headers, body content, and how long the request took. Note that CORS restrictions may limit which APIs you can call from the browser.

Question 3

What authentication methods are supported?

Accepted Answer

The tool supports Bearer Token authentication, Basic Auth (username/password), and API Key authentication. API keys can be sent either as a header or as a query parameter. All authentication data stays in your browser and is never sent to any third-party server.

Question 4

Can I save my requests for later?

Accepted Answer

Yes, all requests are automatically saved to your browser's localStorage with the full request configuration including method, URL, headers, body, and parameters. You can click any history entry to reload it. You can also export your history as JSON and import it later or on another device.

Question 5

Is this a free alternative to Postman?

Accepted Answer

Yes, the QTool.io API Request Builder works like a lightweight Postman alternative that runs entirely in your browser with no installation or signup required. It covers the most common API testing needs: building requests, sending them, viewing responses, and managing request history. For a distraction-free experience, use it completely free — no payment required.

Free API Request Builder

Need something more powerful?

QTool.io on GitHub