• We plan to stop building and distributing 32-bit Windows binaries on 2025-Aug-20. Custom 32-bit builds remain available with a deprecated, community-supported status. We recommend migrating to 64-bit Intel or ARM binaries.
• Download our .tar.xz or .zip packages,
  PGP signed with: BDCF 067D 3908 B272 7A4A 9487 67C1 0037 40BF 8DC2
• Standalone curl tool and libcurl DLL. Static libraries included.
• Required: Windows Vista with Universal CRT (x64, ARM64 or x86), macOS 10.9 Mavericks (Intel or ARM), any Linux (amd64, arm64 or experimental RISC-V) with MUSL builds.
• HTTP/3, HTTP/2 support, and more.
• ARM64 Windows builds are Control Flow Guard enabled. Intel builds have CET enabled. All builds have frame pointers enabled.
• Transparent builds, using open source code, run in public, with auditable logs.
• LLVM/Clang build environment with mingw-w64 via Debian, Homebrew, MSYS2. llvm-mingw for ARM64.
• Windows cross-built and published via AppVeyor CI. Linux built via GHA. Using reproducible OS image debian:testing-slim via Docker. macOS built on native OS.
• Linux and macOS builds are experimental and not official curl builds.
• We verify components using SHA-256, and PGP where provided.
• We build reproducible binaries, producing the same hash given the same input sources and C compiler.
• Patching policy: No local patches. We may apply patches if already merged upstream or — for showstoppers — had them submitted with fair confidence of getting merged.
• You can look up our package hashes in lines starting with SHA in the build log.
• Packages built across host platforms do not have identical hashes due to slightly different build options and toolchain builds/versions. Except llvm-mingw builds, which are reproducible across platforms. ARM64 and BoringSSL builds are such by default.
• We code-sign with a self-signed certificate on Windows, and avoid trusted timestamps for reproducibility.

Uses LibreSSL TLS backend.

Windows:
Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns ldap ldaps mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp ws wss
Features: alt-svc AsynchDNS brotli HSTS HTTP2 HTTP3 HTTPS-proxy IDN IPv6 Kerberos Largefile libz NTLM PSL SPNEGO SSL SSPI threadsafe UnixSockets zstd

macOS:
Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns ldap ldaps mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp ws wss
Features: alt-svc AsynchDNS brotli HSTS HTTP2 HTTP3 HTTPS-proxy     IPv6          Largefile libz NTLM PSL        SSL      threadsafe UnixSockets zstd

Linux:
Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns            mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp ws wss
Features: alt-svc AsynchDNS brotli HSTS HTTP2 HTTP3 HTTPS-proxy     IPv6          Largefile libz NTLM PSL        SSL      threadsafe UnixSockets zstd

"noh3", HTTP/2:
Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns ldap ldaps mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp ws wss
Features: alt-svc AsynchDNS brotli HSTS HTTP2       HTTPS-proxy IDN IPv6 Kerberos Largefile libz NTLM PSL SPNEGO SSL SSPI threadsafe UnixSockets zstd

"mini", without brotli and zstd, with OS TLS backend (Schannel, SecureTransport) if available:
Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns ldap ldaps mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp ws wss
Features: alt-svc AsynchDNS        HSTS HTTP2       HTTPS-proxy IDN IPv6 Kerberos Largefile libz NTLM PSL SPNEGO SSL SSPI threadsafe UnixSockets

"micro", without libssh2:
Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns ldap ldaps mqtt pop3 pop3s rtsp          smb smbs smtp smtps telnet tftp ws wss
Features: alt-svc AsynchDNS        HSTS HTTP2       HTTPS-proxy IDN IPv6 Kerberos Largefile libz NTLM PSL SPNEGO SSL SSPI threadsafe UnixSockets

"nano", HTTP/1.1:
Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns ldap ldaps mqtt pop3 pop3s rtsp          smb smbs smtp smtps telnet tftp ws wss
Features:         AsynchDNS        HSTS             HTTPS-proxy IDN IPv6 Kerberos Largefile libz NTLM PSL SPNEGO SSL SSPI threadsafe UnixSockets

"pico", HTTP/1.1-only:
Protocols:                                   http https            ipfs ipns
Features:         AsynchDNS        HSTS             HTTPS-proxy     IPv6          Largefile libz      PSL        SSL SSPI threadsafe

• Latest version for Windows:
  https://curl.se/windows/
• Specific versions for Windows, back to 8.2.0:
  https://curl.se/windows/dl-<curl-version>_<build-1-to-N>/
  Example:
  https://curl.se/windows/dl-8.2.0_1/

https://ci.appveyor.com/project/curlorg/curl-for-win/history

https://github.com/curl/curl-for-win/actions/workflows/daily.yml

See LICENSE.

Information in this document is subject to change without notice and does not represent or imply any future commitment by the participants of the project.

This document © Viktor Szakats, CC BY-SA 4.0