Does this tool send my curl command anywhere?

No. Parsing and code generation both happen in your browser with JavaScript. The command, headers, and any tokens inside it are never uploaded to a server.

Which curl flags are supported?

-X/--request, -H/--header, -d/--data/--data-raw/--data-binary, -F/--form, -u/--user, -b/--cookie, -A/--user-agent, -e/--referer, -G/--get, and -k/--insecure. Common no-op flags like --compressed, -s, -v, and -L are ignored since fetch handles them by default.

Do I need node-fetch or another package?

No. Node.js 18 and later ships a global fetch() implementation, so the generated code runs with a plain "node script.js" call and no extra dependency.

Why does the body use JSON.stringify() with an object literal?

When the body starts with { or [ and parses as valid JSON, the tool renders it as a JavaScript object passed through JSON.stringify() so the payload stays readable and editable, instead of a raw escaped string.

What happens with -F form fields?

Each -F field becomes an entry appended to a FormData object, matching the global FormData available in Node 18+. A value starting with @ is flagged in a comment as a file path, since reading it needs an extra fs step you control.

How does it handle -u for basic auth?

It emits an Authorization header built with Buffer.from(user:pass).toString('base64'), the standard way to base64-encode credentials in Node.js, instead of hardcoding the encoded string.

cURL to Node.js

Name: cURL to Node.js
Availability: InStock
Author: Nham Vu

Paste a curl command and get equivalent Node.js code using the built-in fetch API, with headers, JSON body, cookies, and auth already translated.

curl Command

Node.js (fetch)

Summary

Paste a curl command and get equivalent Node.js code using the built-in fetch API, with headers, JSON body, cookies, and auth already translated.

How it works

Paste a curl command, including one copied from a browser devtools network tab.
The parser tokenizes the command, honoring quotes and backslash line continuations.
Flags such as -X, -H, -d, -b, -u, -F, and -G are mapped to fetch() options.
A JSON body is detected automatically and rendered with JSON.stringify() instead of a raw string.
The generated Node.js script appears in the output box, ready to copy and run with node.

Use cases

Turn a "Copy as cURL" request from browser devtools into a Node.js script.
Reproduce an API call from documentation or a support ticket in Node.js.
Convert a curl example from a README into a starting point for a backend service.
Debug an API integration by replaying the exact request curl sent, in Node.js.
Translate a webhook test command into a repeatable Node.js script.
Build a quick script around a request captured from a mobile app proxy.

Frequently Asked Questions

Last updated: 2026-07-23 · Reviewed by Nham Vu