Which curl flags are supported?

-X/--request, -H/--header, -d/--data(-raw/-binary), and -u/--user for basic auth. Other flags are ignored.

Does it detect JSON bodies automatically?

Yes, if the -d payload is valid JSON it's converted to JSON.stringify(...) automatically.

Can I paste a multi-line curl command with backslashes?

Yes, line continuations with a trailing backslash are handled automatically.

cURL to Fetch Converter

Convert a curl command into JavaScript fetch() code.

Works Offline

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No API

curl command

JavaScript fetch()

fetch("https://api.example.com/users", {
  method: "POST",
  headers: {
    "Content-Type": "application/json"
  },
  body: JSON.stringify({"name":"Ada"})
})
  .then((res) => res.json())
  .then((data) => console.log(data));

About the cURL to Fetch Converter

Paste a curl command copied from your terminal or browser dev tools and instantly convert it into equivalent JavaScript fetch() code, including method, headers, and JSON body.

Examples

POST request

curl -X POST https://api.example.com -d '{"a":1}'

Output

fetch("https://api.example.com", { method: "POST", body: ... })

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser