How to use API Request Builder
- Set the method, URL, headers and any body in API Request Builder.
- API Request Builder builds the equivalent curl command and fetch() code in your browser.
- Copy the curl command or fetch() snippet — nothing is sent until you run it yourself.
About this tool
API Request Builder runs entirely in your browser. API Request Builder turns the request parts you fill in — method, URL, headers, body — into a ready-to-copy curl command and fetch() snippet, in your browser.
Because it only generates text, API Request Builder never contacts the endpoint — you run the request yourself with the copied command. No data is sent anywhere, so it stays fast and private by default.
Frequently asked questions
What does API Request Builder do?
API Request Builder lets you process your input right in the browser using the Method, Endpoint URL controls, with the result shown instantly and nothing uploaded.
Is API Request Builder free to use?
Yes — API Request Builder is completely free, with no usage limits.
Is my input private in API Request Builder?
Yes — your input never leaves your device; API Request Builder does all the work in your browser.
Does API Request Builder send the request?
No — API 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 API Request Builder work offline?
Once the page has loaded, API Request Builder keeps working with no network connection.