Windows · Developer Tools
SWI-Prolog
A comprehensive Prolog implementation
Version 9.2.9.1 · by Jan Wielemaker
Official site: swi-prolog.org
About SWI-Prolog
SWI-Prolog offers a comprehensive free Prolog environment. Since its start in 1987, SWI-Prolog development has been driven by the needs of real world applications. SWI-Prolog is widely used in research and education as well as commercial applications. Join over a million users who have downloaded SWI-Prolog. [more ...](http://www.swi-prolog.org/features.html)
This software is safe to use and is known to give false positive results for some antiviruses. You can read a comment from the author about this [here](https://github.com/SWI-Prolog/issues/issues/67).
How to install SWI-Prolog
- Click Download — the developer's official website opens in a new tab.
- Download the latest version there and run it. Choose Custom/Advanced where offered, and skip any bundled extras.
- Prefer the command line? With Chocolatey you can install and update it with: choco install swi-prolog
- Open SWI-Prolog once it finishes installing.
Frequently asked questions
Is SWI-Prolog free to download?
Yes. The Download button sends you to swi-prolog.org, the developer's official site, where SWI-Prolog is available to download. Grabware doesn't host or modify any files.
What is the latest version of SWI-Prolog?
The version listed here is 9.2.9.1, published /Date(1734. The developer's site always has the newest release.
How do I install SWI-Prolog from the command line?
With Chocolatey, run: choco install swi-prolog. This installs it from the official source and keeps it updated.
Is SWI-Prolog safe?
SWI-Prolog downloads directly from the developer. As always, scan the installer with your antivirus and choose Custom setup to skip any bundled extras.
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