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Download SWI-Prolog development versions

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Binaries
Windows version (64-bits)13,679,935 bytesSWI-Prolog 9.1.20-1 for Microsoft Windows (64 bit)

Self-installing executable for Microsoft's 7/8/10 64-bit editions. See the reference manual for deciding on whether to use the 32- or 64-bits version.

SHA256:73a8512b7193637264b3e1a1e14e60326a02f8efa5f7da7ffb9a21d510caaa2d
Windows version (32-bits)13,701,664 bytesSWI-Prolog 9.1.20-1 for Microsoft Windows (32 bit)

Self-installing executable for MS-Windows. Installs swipl-win.exe and swipl.exe. Works on Windows 7/8/10.

SHA256:9f937f1c7014932353ea12cf471078765995dcdb7dbd58f729a2c59ea1b1f058
MacOS bundle51,910,664 bytesSWI-Prolog 9.1.20-1 for MacOSX 10.14 (Mojave) and later on x86_64 and arm64

Mac OS X disk image with relocatable application bundle. Needs xquartz (X11) installed for running the development tools. The bundle also provides the commandline tools in the Contents/MacOS directory. Users of older MacOS versions are adviced to use Macports, Homebrew or install from source. This bundle contains universal (fat) binaries that run natively on Intel and Apple Silicon (M1, arm64).

SHA256:e2268cfb40570a9a260eb28cd8cd8d06205386bf83b137d01754405e3171be3f
MacOS bundle28,228,994 bytesSWI-Prolog 8.5.3-1 for MacOSX bundle on intel

Mac OS X disk image with relocatable application bundle. Needs xquartz (X11) installed for running the development tools. The bundle also provides the commandline tools in the Contents/MacOS directory. Users of older MacOS versions are adviced to use Macports, Homebrew or install from source.

SHA256:39f755e651abedbc7954215949007a115bb676cc6221ae7881a71819487fadf9
Sources
Source archive12,178,812 bytesSWI-Prolog source for 9.1.20

Sources in .tar.gz format, including packages. See build instructions. See also the GIT repository.

SHA256:f623a2ae145fc7eb7072ee1ed218d5453d871bc7ebea8e3abdef22cba402cd74
Documentation
PDF file3,224,632 bytesSWI-Prolog 9.1.20 reference manual in PDF

SWI-Prolog reference manual as PDF file. This does not include the package documentation.

Show all files
Install scripts may download the SHA256 checksum by appending .sha256 to the file name. Scripts can download the latest version by replacing the version of the file with latest. This causes the server to reply with the location of the latest version using an HTTP 303 See Other message.

About the development releases

The development branches have their own GIT repository at the address below. See the general GIT instructions for details.

% git clone https://github.com/SWI-Prolog/swipl-devel.git

Should I use the development release or the stable one?

Many active SWI-Prolog users track the development releases or GIT versions for developing Prolog applications. Most of the time the development versions are fairly stable. Infrequent larger rewrites to the core infrastructure that may cause instability is typically announced on the forum.

Tracking the latest version offers some advantages for you are user:

  • Bug fixes are quickly available.
  • When you are stuck on a missing feature you can use this quickly after it has been added.
  • Although you are a little more often confronted with incompatibilities and regressions, such issues can be discussed and resolved.