Waikato Environment for Knowledge Analysis (Weka) is a collection of machine learning and data analysis free software licensed under the GNU General Public License. It was developed at the University of Waikato, New Zealand, and is the companion software to the book "Data Mining: Practical Machine Learning Tools and Techniques".
Weka contains a collection of visualization tools and algorithms for data analysis and predictive modeling, together with graphical user interfaces for easy access to these functions. The original non-Java version of Weka was a Tcl/Tk front-end to (mostly third-party) modeling algorithms implemented in other programming languages, plus data preprocessing utilities in C, and a makefile-based system for running machine learning experiments. This original version was primarily designed as a tool for analyzing data from agricultural domains, but the more recent fully Java-based version (Weka 3), for which development started in 1997, is now used in many different application areas, in particular for educational purposes and research. Advantages of Weka include:
What is Weka?
Weka is an open-source languages & sdk program for Windows from Machine Learning Group, University of Waikato, Hamilton, NZ (developed by University of Waikato). It is written in Java. Besides Windows, it is available for Unix-like operating system.
Installation and requirements
Official installers exist for 32-bit as EXE (NSIS). The main installer is 133.0 MB. It needs Windows 10 or newer. The installer supports unattended (silent) installation.
Updates and version history
The current version is 3.9.6, released on January 27, 2022. 2 versions are listed since September 8, 2023, each with links to its own installer files. That is about 1.2 releases a year. The last update is more than a year old.
Popularity and file types
The Chocolatey package has been downloaded 7,746 times. Wikipedia has an article about it in 24 of our languages. Similar programs include Go Programming Language, LLVM and Deno.
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Documented silent install
- Also runs on Unix-like operating system
Cons
- No native ARM64 build
- 32-bit only
- No update for more than a year
In short: Weka is an open-source languages & sdk tool for 32-bit PCs. Updates have slowed down. Administrators can deploy it unattended.
Screenshots
Is Weka safe to download?
- The file is served by sourceforge.net; check that it is the publisher’s official mirror
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
E21D58BD08E5380DBAC2AA665C0371F126DAB74A4420CC949FA1C1A16E860C92· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 2 versions ›2 versions over 2 years · about 1.2 a year
| Version | Date | Size | Files |
|---|---|---|---|
| 3.9.6Latest | January 27, 2022 | 133.0 MB | 32-bit EXE (NSIS) |
| 3.8.6 | September 8, 2023 | 133.2 MB | 64-bit EXE (NSIS) |
Install from the command line
Silent install ›winget install --id UniversityOfWaikato.Weka -echoco install Weka -ydownload /SRelated guide: How to use winget: install and update apps
Information
- Publisher
- Machine Learning Group, University of Waikato, Hamilton, NZ
- Developer
- University of Waikato
- Category
- Languages & SDKs
- Licence
- GNU General Public License version 3.0
- Price
- Free
- Source code
- git.cms.waikato.ac.nz
- Written in
- Java
- Requires
- Windows 11 / 10 (Windows 10+)
- Architecture
- 32-bit
- Installer
- EXE (NSIS)
- Other platforms
- Unix-like operating system
- Version
- 3.9.6
- Released
- January 27, 2022
- Added to the catalogue
- January 31, 2022
- Versions listed
- 2
- Updates / year
- 1.2
- Chocolatey downloads
- 7,746
- Website
- cs.waikato.ac.nz
- winget ID
- UniversityOfWaikato.Weka
- Chocolatey package
- Weka
Ratings and reviews
No reviews yet. Be the first to rate it.
Alternatives to Weka
See all ›-
Go Programming Language1.27.0An open source programming language that makes it simple to build secure, scalable systems.Open source2.1M ↓ -
Open source2.8M ↓ -
Open source249.7K ↓ -
Open source3.7M ↓ -
Yarn1.22.22Yarn is a package manager that doubles down as project manager. Whether you work on one-shot projects or large monorepos, as a hobbyist or an enterprise user, we've got you covered.Open source1.9M ↓ -
Ccache4.14.1Ccache is a compiler cache. It speeds up recompilation by caching previous compilations and detecting when the same compilation is being done again.Open source2.2M ↓ -
Open source263.6K ↓ -
Open source12.5K ↓
Frequently asked questions
Is Weka free?
Yes. Weka is open-source software under the GNU General Public License version 3.0 licence.
Is Weka safe to download?
The download comes from sourceforge.net; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Weka with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can Weka be installed silently?
Yes. The silent install page lists the exact command for each installer.
Which Windows versions does Weka support?
The installer requires Windows 10 or newer and is available for 32-bit.
Does Weka run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 32-bit version through emulation.
Where can I download an older version of Weka?
The versions page lists all 2 versions with links to their official installer files, back to September 8, 2023.
What are alternatives to Weka?
Go Programming Language, LLVM, Deno, CMake and Yarn. The alternatives page compares them.
