Question 1

What curl flags does curlfetch support?

Accepted Answer

curlfetch handles -X / --request (method), -H / --header (headers), -d / --data / --data-raw / --data-binary (body), -u / --user (basic auth), -b / --cookie (cookies), -L / --location (redirect mode), -k / --insecure (mode: no-cors), and --max-time / --connect-timeout (signal / AbortController timeout).

Question 2

Does curlfetch send my curl command to a server?

Accepted Answer

No. curlfetch parses your curl command entirely in JavaScript running in your browser. Nothing is sent to any server. Your command, URLs, headers, and body data stay on your machine.

Question 3

Can I use the output directly in Node.js?

Accepted Answer

Yes. The output uses the standard fetch() API which is available in Node.js 18+ natively and in earlier versions via the node-fetch package. For environments without native fetch, wrap the output in an import or require statement for your fetch polyfill.

Question 4

What happens with curl commands that use --data-urlencode?

Accepted Answer

curlfetch treats --data-urlencode the same as --data for the fetch body. Full urlencode parameter expansion is not performed client-side, but the raw value is preserved in the body string so you can apply encodeURIComponent() yourself if needed.

curl → fetch()

Simple GET

POST with JSON body

Bearer auth header

Basic auth (-u)

DELETE request

Follow redirects (-L)

supported flags

-X / --request	HTTP method (GET, POST, PUT, PATCH, DELETE, etc.)
-H / --header	Request headers (repeatable)
-d / --data / --data-raw / --data-binary	Request body
-u / --user	Basic auth → Authorization: Basic header
-b / --cookie	Cookie header
-L / --location	Follow redirects → redirect: "follow"
-k / --insecure	mode: "no-cors" (noted in comment)
--max-time / --connect-timeout	AbortController signal with setTimeout