curl to fetch converter

Turn any curl command into a JavaScript fetch() call you can paste into the browser console, a React app or Node.js 18+, where fetch is built in.

const response = await fetch("https://mockfox.dev/api/fake/posts", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    Authorization: "Bearer YOUR_TOKEN",
  },
  body: JSON.stringify({
    "title": "Hello",
    "body": "From curl",
    "userId": 1
  }),
});

const data = await response.json();

How to convert a curl command

1. Paste the command into the box (multi-line commands with \ continuations are fine) — or copy one from DevTools with Copy as cURL.
2. Pick the output language. The code updates as you type.
3. Copy or download the code, and check any warnings about options that can't be converted.

fetch vs curl: differences to know

• fetch doesn't reject on HTTP errors. A 404 or 500 resolves normally; check response.ok or response.status.
• Basic auth becomes an Authorization: Basic … header with the base64-encoded credentials.
• Multipart uploads use FormData; never set Content-Type yourself, or the boundary will be missing.
• In browsers, CORS applies and headers like Cookie and User-Agent can't be set. Use credentials: "include" to send cookies.

Need an endpoint to try your code against? Use the free fake REST API or test any HTTP status code.

Related tools

• cURL converter
• curl to Python converter
• curl to Go converter
• curl to Axios converter
• HTTP headers reference
• Webhook tester — inspect incoming requests