A command line tool and library for transferring data with URL syntax, supporting 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 and WSS. libcurl offers a myriad of powerful features
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Viktor Szakats 32500f12c4
HTTP3.md: minor improvements
- document building curl with CMake.

- mention all supported forks in the OpenSSL section. Delete dedicated
  quictls section.

- add TLS-backend pkgconfig dir to `PKG_CONFIG_PATH` for correctness.
  OpenSSL-based ones often work without this, by finding system
  `openssl.pc`. For GnuTLS and wolfSSL this has a lesser chance. Best to
  point to them explicitly. (configure may technically be able to do
  this automatically, but it isn't implemented.)

- use `--with-ngtcp2=<path>` again, where possible.
  GnuTLS is the exception, pending fix in #20910.
  Same for BoringSSL, but not documented in `HTTP3.md`.

- replace `<somewhereN>` with `/path/to/depname` for clarity.

- move `LDFLAGS` after `./configure` for curl, to match dep builds.

- move `--with-ngtcp2` next to the TLS-backend option.

Follow-up to 1e3c2bec7e #20926
Follow-up to 3c64ffaff4 #18415 #18188
Cherry-picked from #20920

Closes #20947
2026-03-17 12:28:58 +01:00
.circleci runtests: detect bad libssh differently for test 1459 (fixing CircleCI libssh job) 2025-11-16 23:28:44 +01:00
.github GHA/http3-linux: add CI reproducer for --with-ngtcp2=<path> regression 2026-03-17 02:47:05 +01:00
CMake cmake: rework binutils ld hack to not read LOCATION property 2026-03-16 13:32:39 +01:00
docs HTTP3.md: minor improvements 2026-03-17 12:28:58 +01:00
include RELEASE-NOTES: synced 2026-03-11 08:49:39 +01:00
lib url: don't assume all transfers have hostnames 2026-03-17 10:26:35 +01:00
LICENSES krb5: drop support for Kerberos FTP 2025-09-20 23:58:28 +02:00
m4 build: drop openssl module dependency for BoringSSL from libcurl.pc 2026-03-17 00:42:41 +01:00
projects os400sys: fix typo in comment (symetry -> symmetry) 2026-03-15 12:00:08 +01:00
scripts mk-ca-bundle.pl: make generated timestamps deterministic 2026-03-16 11:59:59 +01:00
src tool_cb_wrt: fix no-clobber error handling 2026-03-16 15:31:44 +01:00
tests url: don't assume all transfers have hostnames 2026-03-17 10:26:35 +01:00
.clang-tidy.yml tidy-up: miscellaneous 2026-03-09 11:35:19 +01:00
.dir-locals.el copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
.editorconfig .editorconfig: add 2025-09-02 08:36:40 +02:00
.git-blame-ignore-revs copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
.gitattributes winbuild: MS-DOS batch tidy-ups 2024-07-02 19:26:15 +02:00
.gitignore build: drop the winbuild build system 2025-09-20 01:20:25 +02:00
.mailmap mailmap: Hamza Bensliman 2026-02-26 20:07:23 +01:00
acinclude.m4 configure: also trace two important pkg-config envs 2026-03-16 18:33:32 +01:00
appveyor.sh tidy-up: miscellaneous 2026-03-09 11:35:19 +01:00
appveyor.yml appveyor: minor improvements [ci skip] 2026-02-27 16:04:21 +01:00
buildconf copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
CHANGES.md CHANGES: fix typo in filename 2026-01-01 12:20:10 +01:00
CMakeLists.txt build: drop openssl module dependency for BoringSSL from libcurl.pc 2026-03-17 00:42:41 +01:00
configure.ac build: drop openssl module dependency for BoringSSL from libcurl.pc 2026-03-17 00:42:41 +01:00
COPYING COPYING: bump copyright year range to 1996 - 2026 2026-01-08 23:19:44 +01:00
curl-config.in autotools: tidy-up if expressions 2025-12-10 22:29:19 +01:00
Dockerfile Dockerfile: update debian:bookworm-slim digest to 74d56e3 2026-03-03 01:36:55 +01:00
GIT-INFO.md REUSE: add copyright header to two files 2025-11-03 16:08:52 +01:00
libcurl.pc.in configure: do not echo most inherited LDFLAGS to config files 2024-11-14 09:55:45 +01:00
Makefile.am build: hook up badwords check to lint targets 2026-03-12 01:25:42 +01:00
README BUG-BOUNTY.md: we stop the bug-bounty end of Jan 2026 2026-01-26 08:26:28 +01:00
README.md README: add MQTTS 2026-02-05 22:55:01 +01:00
RELEASE-NOTES RELEASE-NOTES: fix typo 2026-03-13 10:25:27 +01:00
renovate.json renovate: merge two custom regex rules, escape dots 2026-01-23 15:58:16 +01:00
REUSE.toml badwords: avoid 'simply' 2026-03-10 19:34:06 +01:00
SECURITY.md stop using the word 'just' 2026-03-03 15:30:22 +01:00

curl logo

curl is a command-line tool for transferring data from or to a server using URLs. It supports these protocols: DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, MQTTS, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET, TFTP, WS and WSS.

Learn how to use curl by reading the man page or everything curl.

Find out how to install curl by reading the INSTALL document.

libcurl is the library curl is using to do its job. It is readily available to be used by your software. Read the libcurl man page to learn how.

Open Source

curl is Open Source and is distributed under an MIT-like license.

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All contributors to the project are listed in the THANKS document.

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