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command line tool and library
for transferring data with URLs
(since 1998)

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WHAT IS CURL USED FOR?

curl is used in command lines or scripts to transfer data. curl is also libcurl,
used in cars, television sets, routers, printers, audio equipment, mobile
phones, tablets, medical devices, settop boxes, computer games, media players
and is the Internet transfer engine for countless software applications in over
twenty billion installations.

curl is used daily by virtually every Internet-using human on the globe.


CURL SUPPORTS

Protocols DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS,
LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP,
SMTPS, TELNET, TFTP, WS, WSS Proxies SOCKS4, SOCKS5, HTTP, HTTPS (HTTP/1 and
HTTP/2), tunneling, via unix domain sockets, haproxy, SOCKS+HTTP proxy chain
HTTP GET, POST, PUT, HEAD, multipart formpost, HTTP/0.9, HTTP/1.0, HTTP/1.1,
HTTP/2 (h2c, h2, prior knowledge), HTTP/3 (dual connect h1/h2 + h3 or h3-only),
HSTS, Alt-Svc, cookies, PSL, etags, transfer compression, ranges, custom
headers, custom method, follow redirects FTP IPv6 (EPRT, EPSV), STLS,
upload/download, append, range, passive/active, kerberos, directory listing,
custom commands SCP + SFTP known hosts, md5/sha256 fingerprint, compression,
upload/download, directory listing TLS 1.0 - 1.3, mutual authentication,
STARTTLS, OCSP stapling, ECH, False Start, key pinning, PQC ready, session
resumption Auth Basic, Plain, Digest, CRAM-MD5, SCRAM-SHA, NTLM, Negotiate,
Kerberos, Bearer tokens, AWS Sigv4, SASL, .netrc HTTP Compression gzip, brotli
and zstd Name resolving DNS-over-HTTPS, custom address for host, name+port
redirect, custom DNS servers, DNS caching Connection connection reuse, Interface
binding, Happy Eyeballs, IPv4/IPv6-only, unix domain sockets, TCP keepalive, TCP
Fast Open, TCP Nodelay, MPTCP, VLAN priority, IP Type Of Service Transfers
transfer rate limiting, request rate limiting, stall detection, retries,
timeouts URLs Unlimited amount, parallel and serial transfers, globbing Output
IDN hostnames, custom info from transfer, metadata as JSON, per
content-disposition, libcurl source code, bold headers


WHO MAKES CURL?

curl is free and open source software and exists thanks to thousands of
contributors and our awesome sponsors. The curl project follows well established
open source best practices. You too can help us improve!


WHAT IS THE LATEST CURL?

The most recent stable version is 8.11.0, released on 2024-11-06. Currently, 107
of the listed downloads are of the latest version.


WHERE IS THE CODE?

Check out the latest source code from GitHub.