cURL to Fetch Converter – cURL to JavaScript fetch()

I built this because I kept copying network requests from Chrome DevTools as cURL and then rewriting them by hand into fetch(). Paste the cURL, get working fetch() code, and stop rewriting headers manually.

100% free, no signup

curl command

JavaScript fetch()

fetch("https://example.com", {
  method: "POST",
  headers: {
    "Content-Type": "application/json"
  },
  body: "{\"email\":\"you@example.com\",\"password\":\"secret\"}"
})
  .then((res) => res.json())
  .then((data) => console.log(data));

Your files are processed in your browser and never uploaded to any server.

A note from me

One thing that's easy to miss: cURL commands from DevTools include a lot of headers you don't actually need — cookies, user-agent, and tracking headers. The tool keeps them all, which is fine for testing, but strip the unnecessary ones before production. Also, if the request has `--compressed` or `-k` flags, those don't map to fetch() — you'll need to handle them separately.

— Mirza Noman Baig

How to use this tool

1Copy a cURL command from terminal, docs, or browser DevTools.
2Paste it into the editor.
3The tool extracts URL, method, headers, and body.
4Copy the generated fetch() code into your project.

Real results from testing

These are actual measurements from using this tool, not estimates.

Reproducing a browser request

Before

Copied a POST request as cURL from Chrome DevTools

After

Working fetch() code with the right headers

Saved 10 minutes of manual header copying. The Authorization header was easy to miss.

Testing an API from docs

Before

Docs only had a cURL example

After

fetch() code ready for a React component

Docs were written for backend devs. This tool bridged the gap.

Debugging a 401 error

Before

Request worked in terminal, failed in the browser

After

Converted cURL to fetch — saw the missing cookie

The terminal cURL used a session file. The browser needed the cookie explicitly. Made it obvious.

cURL to Fetch Converter features

Converts cURL to fetch

Extracts URL, method, headers, and body — generates working code.

Handles headers and bodies

Common auth headers, JSON bodies, and form data all map correctly.

Works with DevTools output

Designed for 'Copy as cURL' from Chrome and Firefox.

Runs locally

Tokens in Authorization headers never leave your browser.

Frequently asked questions

Does it handle all cURL flags?+

It handles the common ones: -X, -H, -d, --data-raw, -u, --compressed. Some flags don't have a fetch() equivalent and are skipped.

Can it convert Copy as cURL from Chrome?+

Yes. That's the main use case. Chrome, Firefox, and Edge all work.

Are my API tokens uploaded?+

No. Everything runs in your browser. Your cURL commands, including any Authorization headers, never leave your device.

Does it support POST bodies?+

Yes. JSON bodies, form data, and URL-encoded bodies all map correctly to fetch() options.

Can it generate Axios instead of fetch?+

This tool generates fetch(). Axios syntax is different and not currently supported.