Ruby

ApplicationRuby

Also called rubyinstaller, ruby installer, mri ruby

RubyProductivity

The Ruby language on Windows. RubyInstaller is the usual path. The process is ruby.exe. It is not Python.

What you need to know

Ruby on Windows is usually RubyInstaller. It is not Python.

ruby.exe is MRI. RubyInstaller is the usual Windows build. python.exe is a different language.

What is it?: Language runtime
Still current?: Yes, see Current status
Official download?: Use the vendor link in this article

Feex says

If gem install fails on a native extension, I run ridk install from RubyInstaller. I do not pip install that gem, and I do not switch to python.exe.

What is Ruby?

ruby.exe is MRI Ruby. RubyInstaller wraps it for Windows. Python is python.exe. Gems are not pip.

If you have never used it

If you need Ruby on Windows, use RubyInstaller from rubyinstaller.org, then ridk to get MSYS2 build tools when gems need them. python.org is a different language. Rails tutorials that say "install Ruby" mean this runtime, not Python.

What is it used for?

Run .rb scripts and irb

ruby.exe. python.exe will not run that file.

gem install

RubyGems. Native gems need ridk / MSYS2 from RubyInstaller, not a Python venv.

Rails and other frameworks

Those sit on this runtime. A Node or Python stack is a different tutorial.

Who is it for?

People following a Rails on Windows guide
Anyone who typed ruby and got nothing
Users who almost installed Python for a .rb file

Current status

Ruby (1995) is a current language runtime from Ruby. The vendor still points Windows users at https://rubyinstaller.org/.

How old is it?

Ruby dates to 1995. RubyInstaller has been the practical Windows path for years. The old RailsInstaller brand is stale. Python is a sibling language, not a Ruby build.

Versions

Major channels first. Exact build numbers are not all verified here.

RubyInstaller 3.x

Ruby+Devkit

System requirements

Values follow the publisher's public guidance. Workload still changes the real need.

Minimum

Minimum system requirements
Operating system	A current supported Windows 10 or Windows 11 release, per the vendor
RAM	Enough for Windows plus this app. Heavy projects want more.

Resource profile

CPU demand: Follows what you open inside the app
RAM demand: Follows documents, tabs, or libraries

Installed processes

These executables belong to this product when it is installed.

Installed processes
ruby.exe	Main Windows executable
ridk.cmd	MSYS2 helper RubyInstaller documents

Startup components

ruby.exe does not start with Windows unless a script in Startup calls it.

File locations

Common Ruby locations
Typical install	C:\Ruby3x-x64\

File formats

RBGEMFILE

Common problems

Installed Python because the homework said "a scripting language"

A .rb file needs ruby.exe. Python will not parse it.

Native gem failed without MSYS2

RubyInstaller's ridk is the documented fix. That is not a Laragon issue.

Getting unstuck

Install from rubyinstaller.org (Ruby+Devkit if you will compile gems)

ruby-lang.org documents the language. The Windows bits are RubyInstaller.

ridk install when a gem needs a compiler

MSYS2 toolchain. Visual C++ redist is a different runtime some gems still mention.

where.exe ruby if the Store or another ruby.exe stole PATH

Confirm Program Files\Ruby3x, not a random Downloads copy.

Alternatives

WSL Ubuntu plus apt ruby is another Windows path. Python and PHP are other languages. Laragon can add Ruby, but RubyInstaller is the usual standalone.

Official help and downloads

Start with the vendor. Random exe sites are not a support channel.

Official contacts
Download	rubyinstaller.org/ Official installer or vendor page
Help	www.ruby-lang.org/en/documentation/ Vendor support
Official site	rubyinstaller.org/ Start here, not a random exe host

Related hardware

The interpreter is light. Rails and native gems want a compiler toolchain and RAM for bundler.

Technical details

Vendor version numbers change. This article does not pin a build.

Sources and verification

Reviewed by Feex editorial. Last verified August 2026 Status: Feex Reviewed. How we research.

Ruby official site · Vendor product page
Ruby help · Vendor support
Ruby language site · Language docs. RubyInstaller is the usual Windows build
Foxhole process map · First-party samples on Windows PCs. Not a lab benchmark.

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