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cURL to Fetch Converter - Convert cURL to JavaScript

Convert cURL commands to JavaScript fetch() code instantly. Supports headers, request body, auth, cookies, and all common cURL flags. Free, browser-based, no sign-up.

Quick Examples

Free Online cURL to Fetch Converter

The cURL to fetch converter translates any cURL command into clean, ready-to-use JavaScript fetch() code. Paste your cURL command — copied from browser DevTools, Postman, API documentation, or a terminal — and get the equivalent fetch() call instantly, with all headers, request body, and authentication preserved.

This cURL to JavaScript converter runs entirely in your browser. Your cURL commands may contain API keys, Bearer tokens, and sensitive headers — none of that is ever sent to a server. The conversion is instant, private, and works offline.

You can choose between async/await with try/catch (recommended for modern JavaScript) or a plain Promise-based version. If the request body is valid JSON, it's automatically formatted as a JavaScript object. Unsupported cURL flags can be shown as inline comments so you know exactly what was and wasn't converted.

Supported cURL Flags

Flag Description fetch() equivalent
-X, --request HTTP method method: "POST"
-H, --header Request header headers: { ... }
-d, --data Request body (string) body: "..."
--data-raw Request body (raw) body: "..."
--data-binary Request body (binary) body: "..."
-u, --user Basic authentication Authorization: Basic ...
-b, --cookie Send cookies Cookie header
--compressed Accept compressed response Accept-Encoding header
-L, --location Follow redirects redirect: "follow"
-k, --insecure Skip TLS verification // comment (not supported in browser)

How to Use

  1. Paste your cURL command into the left panel, or click one of the quick example buttons to load a sample.
  2. Choose your options: async/await style, JSON body parsing, and whether to show unsupported flags as comments.
  3. Click "Convert to fetch()" — or just start typing and the output updates automatically.
  4. Click "Copy" to copy the generated fetch() code to your clipboard.

Getting cURL from Browser DevTools

The fastest way to get a cURL command for any HTTP request is directly from your browser's Network tab:

  1. Open DevTools (F12 or Cmd+Option+I).
  2. Go to the Network tab and trigger the request you want to replicate.
  3. Right-click the request in the list → Copy → Copy as cURL.
  4. Paste it here and convert to fetch() in one click.

This works in Chrome, Firefox, Edge, and Safari — and is the most reliable way to capture all headers, cookies, and request bodies exactly as the browser sent them.

Frequently Asked Questions

What cURL flags does this converter support?

The converter handles the most common cURL flags: -X / --request (method), -H / --header (headers), -d / --data / --data-raw / --data-binary (request body), -u / --user (Basic Auth), -b / --cookie (cookies), --compressed (Accept-Encoding), -L / --location (redirect following), and -k / --insecure. Unsupported flags are listed as comments in the output.

Does it support async/await output?

Yes. You can toggle between a plain Promise-based fetch() and an async/await version with try/catch error handling. The async/await version also includes response.json() parsing.

Can I convert cURL commands with JSON bodies?

Yes. If the request body is valid JSON, the converter automatically formats it as a JavaScript object literal in the output. If it's not valid JSON (e.g. form data), it's kept as a string.

What is the difference between fetch() and cURL?

cURL is a command-line tool for making HTTP requests, commonly used in terminals and shell scripts. fetch() is the browser-native JavaScript API for making HTTP requests from web pages or Node.js. They serve the same purpose but in different environments.

Does this tool send my cURL command to a server?

No. The entire conversion happens in your browser using JavaScript. Your cURL commands — which may contain API keys, tokens, or sensitive headers — are never transmitted anywhere.

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