Supermium is a free and open-source web browser developed by Shane Fournier, with its first version being released in May 2023. It is a fork of Chromium with its main feature being support for older versions of Microsoft Windows that are no longer supported by Chromium-based browsers like Google Chrome; this includes all versions prior to Windows 10, starting with Windows XP.
Supermium has 32-bit and 64-bit executables. Its version numbers are parallel with Chromium's, and revisions of the same main version, like R4, are added to the version number.
Supermium debuted in May 2023 to supersede the developer's previous approach to bring modern versions of Google Chrome and other modern software to Windows Vista. Initial efforts consisted of a collection of modified system binaries (bundled in an installable package called the Extended Kernel) that adds system functions in order to make the browser compatible with Vista. This approach reached its limit when Google dropped support for Chrome on versions of Windows earlier than Windows 10, with version 110 in February 2023. The initial goal centered on Vista became insufficient, which led to the creation of the Supermium project, and at the same time making new software and drivers compatible with older Windows versions led to the founding of the Legacy Software Corporation by Shane Fournier, the developer.
What is Supermium?
Supermium by win32ss is open-source Windows software in the web browsers category. It ranks 42nd by popularity among web browsers in this catalogue. Its interface is available in 3 languages.
Installation and requirements
The publisher provides EXE installers for 64-bit and 32-bit Windows. It can be installed for the current user only, without administrator rights. A silent install is possible with the installer’s documented switches.
Updates and version history
The current version is 144.0.7559.247 R2, released on October 21, 2026. The version history goes back to December 6, 2023: 16 releases, all linked to the official files. That is about 5.6 releases a year. The last update is less than a month old.
Popularity and file types
The source code on GitHub (win32ss/supermium) has 4,849 stars. Wikipedia has an article about it in 7 of our languages. On Windows it registers 8 file types, including .pdf, .html, .xhtml, .webp and .htm. Similar programs include Brave, Waterfox and Google Chrome.
Project description on GitHub: “Chromium fork for Windows XP/2003 and up”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Documented silent install
- Installs without administrator rights
- Updated in the last two months
Cons
- No native ARM64 build
In short: Supermium is an open-source web browser tool for 64-bit and 32-bit PCs. It is actively maintained. Administrators can deploy it unattended.
Is Supermium safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
E11192D87300A652854C3B28C1290A730509E5AD3C7C096579859DAD6139B9CB· Open the VirusTotal report for this hash - The link has not been checked yet
- 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 16 versions ›16 versions over 3 years · about 5.6 a year
| Version | Date | Size | Files |
|---|---|---|---|
| 144.0.7559.247 R2Latest | October 21, 2026 | — | 32-bit EXE64-bit EXE64-bit EXE32-bit EXE |
| 144.0.7559.189 R1 | March 13, 2026 | — | 64-bit EXE32-bit EXE64-bit EXE32-bit EXE |
| 138.0.7204.300 R9 | January 25, 2026 | — | 32-bit EXE64-bit EXE64-bit EXE32-bit EXE |
| 138.0.7204.295 R7 | December 19, 2025 | — | 64-bit EXE64-bit EXE32-bit EXE32-bit EXE |
| 132.0.6834.226 R5 | August 18, 2025 | — | 64-bit EXE32-bit EXE64-bit EXE32-bit EXE |
| 132.0.6834.224 R4 | June 6, 2025 | — | 32-bit EXE64-bit EXE32-bit EXE64-bit EXE |
| 132.0.6834.222 R3.01 | May 7, 2025 | — | 32-bit EXE64-bit EXE64-bit EXE32-bit EXE |
| 132.0.6834.222 R3 | May 3, 2025 | — | 64-bit EXE32-bit EXE32-bit EXE64-bit EXE |
Install from the command line
Silent install ›winget install --id win32ss.Supermium -escoop install extras/supermiumsupermium_150_64_setup_win10_11.exe -y --silent --path="C:\Program Files (x86)\Supermium"Related guide: How to use winget: install and update apps
Information
- Publisher
- win32ss
- Category
- Web browsers
- Licence
- BSD-3-Clause
- Price
- Free
- Source code
- github.com/win32ss/supermium
- Interface languages
- multiple languages, Ukrainian, and Russian
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, 32-bit
- Installer
- EXE
- Version
- 144.0.7559.247 R2
- Released
- October 21, 2026
- Added to the catalogue
- January 10, 2024
- Versions listed
- 16
- Updates / year
- 5.6
- GitHub stars
- 4,849
- GitHub forks
- 179
- Website
- win32subsystem.live
- winget ID
- win32ss.Supermium
- Scoop package
- extras/supermium
File types it opens (8)
Ratings and reviews
No reviews yet. Be the first to rate it.
Alternatives to Supermium
See all ›-
Open source4.9M ↓ -
Open source155.2K ↓ -
Free394.1M ↓ -
Open source47.5K ↓ -
Open source139.8K ↓ -
Open source8.8K ↓ -
Free40.5K ↓ -
Yandex Browser26.10.0.1854Yandex Browser delivers fast and secure browsing with built-in Alice and the ability to sync passwords, bookmarks, and bank cards across devices.Free10.2K ↓
Frequently asked questions
Is Supermium free?
Yes. Supermium is open-source software under the BSD-3-Clause licence.
Is Supermium safe to download?
The download comes from github.com, which belongs to the publisher; 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 Supermium 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 Supermium be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does Supermium run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit and 32-bit version through emulation.
Where can I download an older version of Supermium?
The versions page lists all 16 versions with links to their official installer files, back to December 6, 2023.
Can I use Supermium without administrator rights?
Yes, there is a per-user installer that does not need administrator rights.
What are alternatives to Supermium?
Brave, Waterfox, Google Chrome, qutebrowser and ungoogled-chromium. The alternatives page compares them.
