cURL → fetch Converter

Turn a curl command into a JavaScript fetch() snippet.

Convert a curl command to a JavaScript fetch() snippet instantly. Free curl to fetch converter that runs in your browser — nothing uploaded, no signup.

About cURL → fetch Converter

cURL → fetch Converter is a free, browser-based tool that turns a curl command into an equivalent JavaScript fetch() snippet you can paste straight into code. Paste a curl command and it parses the flags — method, headers, request body, basic auth, and URL — then emits a ready-to-copy fetch() call, updating live as you type. It uses a small dependency-free shell-style parser that runs entirely locally in your browser, so nothing is uploaded and there is no signup.

How to use cURL → fetch Converter

  1. Paste your curl command into the 'curl command' box on the left, or click 'Try an example' to load a sample request.
  2. The 'fetch() snippet' panel on the right updates automatically as you type, with no convert button to press.
  3. Check the stat row above — Method, Headers count, whether a Body was detected, and the output length — to confirm the command parsed as expected.
  4. Select part of the output to copy just a section, or click the copy button to grab the whole fetch() snippet.
  5. Paste the snippet into your JavaScript or TypeScript code.

Frequently asked questions

Is my curl command or data uploaded to a server?
No. Parsing and conversion happen entirely in your browser using a dependency-free local parser — your command, headers, tokens, and request body never leave your device and nothing is uploaded.
Is it free and do I need an account?
Yes, it's completely free with no signup, account, or watermark.
Which curl flags does it support?
It handles -X / --request for the method, -H / --header for headers, -d / --data (plus --data-raw, --data-binary, --data-ascii, and --data-urlencode) for the body, -u for HTTP basic auth, and --url. Single and double quotes and backslash-newline line continuations are all parsed correctly.
How does it handle -u basic auth and the request method?
A -u user:pass pair is base64-encoded and added as an Authorization: Basic header (it won't overwrite one you set explicitly). The method defaults to GET, or POST automatically when a body is present, unless you specify -X.
What happens if my command is malformed?
The parser never crashes — instead it shows a clear message, for example if your quotes are unbalanced, the input doesn't start with 'curl', a flag is missing its value, or no URL was found.
Is there a limit on input size?
Yes, input is capped at 100 KB so a huge paste can't freeze the live per-keystroke parsing. That's far more than any real curl command needs.

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