cURL

curl
Original authorDaniel Stenberg
DeveloperContributors to the curl project
Initial release1996 (1996)
Stable release
8.19.0  / 11 March 2026
Written inC
Platform29 platforms (see § libcurl for details)
TypeWeb client (supports e.g. HTTPS, and FTP)
Licensecurl license (inspired by the MIT License) and a fraction uses the ISC
Websitecurl.se 
Repository

cURL (pronounced like "curl", /kɜːrl/) is a free and open source CLI app for uploading and downloading individual files. It can download a URL from a web server over HTTP, and supports a variety of other network protocols, URI schemes, multiple versions of HTTP, and proxying. The project consists of a library (libcurl) and command-line tool (curl), which have been widely ported to different computing platforms. It was created by Daniel Stenberg, who is still the lead developer of the project.