API & cURL Tools

HTTP Request Builder

HTTP Request Builder builds a raw HTTP/1.1 request message from a request line, Host, headers, and body, and exports an equivalent curl command.

Client-sideRuns entirely in your browser — your data never leaves your device.

HTTP Request Builder is a free API & cURL Tools utility that runs entirely in your browser — nothing you enter is uploaded.

Headers (one per line, Key: Value)
Body
Raw HTTP request
curl export

How to use HTTP Request Builder

  1. Set the method, URL, headers and any body in HTTP Request Builder.
  2. HTTP Request Builder builds the equivalent curl command and fetch() code in your browser.
  3. Copy the curl command or fetch() snippet — nothing is sent until you run it yourself.

About this tool

There is no server behind HTTP Request Builder. HTTP Request Builder builds an HTTP request from the method, URL, headers and body you enter and shows the equivalent curl command and fetch() code.

It assembles the snippet locally so you can copy it into a terminal or code; it does not send the request, so nothing leaves your browser. Your input never leaves the page, and no account or install is required.

Frequently asked questions

How do I use HTTP Request Builder?

Use HTTP Request Builder to process your input without installing anything using the Method, URL controls; everything happens client-side.

Is HTTP Request Builder free to use?

Yes — HTTP Request Builder is completely free, with no usage limits.

Is my input private in HTTP Request Builder?

Yes — your input never leaves your device; HTTP Request Builder does all the work in your browser.

Does HTTP Request Builder send the request?

No — HTTP Request Builder only assembles the curl command and fetch() snippet from the method, URL, headers and body you enter, in your browser. You copy and run it yourself; nothing is sent from this page.

Does HTTP Request Builder work on mobile?

Yes — HTTP Request Builder is just a web page and runs on any modern browser, including phones and tablets.

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