Folder Size for Windows opens pop-up windows that track open Explorer windows. The new window shows not only the size of files, but also the size of folders. It keeps track of which folders you view, and scans them in the background so you can see complete size of all files within the folder. It's very useful for cleaning up your disk. Once you get used to having that information available, a directory listing simply looks incomplete without it!
Publisher’s description
What is Folder Size?
Folder Size is an open-source program for Windows from Brio.
Installation and requirements
Official installers exist for 64-bit and 32-bit as MSI. The main installer is 295 KB. Installation asks for administrator rights. It needs Windows 10 or newer. The installer supports unattended (silent) installation. An MSI package is available for deployment with Group Policy, Intune or Configuration Manager.
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- MSI package for managed deployment
- Documented silent install
- Small download (295 KB)
Cons
- No native ARM64 build
- Installation needs administrator rights
- No update for more than a year
In short: Folder Size is an open-source Windows tool for 64-bit and 32-bit PCs. Updates have slowed down. Administrators can deploy it unattended.
Is Folder Size safe to download?
- The file is served by sourceforge.net, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
76A5FE05214D9669E09B3DF6FDE80646700B27CB73B1D1FF23066660813A77EC· 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 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 2.6Latest | February 13, 2013 | 295 KB | 64-bit MSI32-bit MSI |
Install from the command line
Silent install ›winget install --id Brio.FolderSize -emsiexec /i download /qn /norestartmsiexec /x {F24FF688-7138-4CCF-A83F-71E9FB01170E} /qn /norestartRelated guide: How to use winget: install and update apps
Information
- Publisher
- Brio
- Licence
- GPL
- Price
- Free
- Requires
- Windows 11 / 10 (Windows 10+)
- Architecture
- 64-bit, 32-bit
- Installer
- MSI
- Version
- 2.6
- Released
- February 13, 2013
- Added to the catalogue
- September 29, 2021
- Versions listed
- 1
- Website
- foldersize.sourceforge.net
- winget ID
- Brio.FolderSize
- MSI product code
- {F24FF688-7138-4CCF-A83F-71E9FB01170E}
Ratings and reviews
No reviews yet. Be the first to rate it.
Frequently asked questions
Is Folder Size free?
Yes. Folder Size is open-source software under the GPL licence.
Is Folder Size safe to download?
The download comes from sourceforge.net, 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 Folder Size 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 Folder Size be installed silently?
Yes. The silent install page lists the exact command for each installer, including msiexec for the MSI package.
Which Windows versions does Folder Size support?
The installer requires Windows 10 or newer and is available for 64-bit and 32-bit.
Does Folder Size 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.