SpaceSniffer
SpaceSniffer is a free Windows program that shows where your disk space goes using colored blocks. It presents large folders and files in a treemap view, so you can spot what is filling your drive in seconds. No installation is needed.
www.uderzo.it
- ✓ Official source (winget)
- ✓ SHA256 taken from the official repository
- ✓ Last checked: Nov. 4, 2026
- This is not a virus scan. Check on VirusTotal
- Version
- 2.2.0.27
- Release date
- March 25, 2026
- License
- Freeware
- Installer type
- zip
How do I use this?
Type Terminal in the Start menu and open it, paste the command (Ctrl+V or right-click) and press Enter. It uses winget, Windows' own package manager, to install the program from its official source.
winget install --id UderzoSoftware.SpaceSniffer -eSHA256 (file verification)
4fcaec94e52b19d3a53350546879e9d9798aeb5515372b40e021754bf3145a19We couldn't find a macOS version of SpaceSniffer in the official repositories; check the publisher's website.
We couldn't find a Linux version of SpaceSniffer in the official repositories; check the publisher's website.
We couldn't find a Android version of SpaceSniffer in the official repositories; check the publisher's website.
Highlights
- Treemap view of folders and files by size
- Click blocks to zoom into folders
- Filter by file type, size and date
- The view updates live while scanning
- Portable, with no installation required
Who is it for?
For users whose drive is full and who want to see quickly which files take up space, and for technicians doing PC maintenance.
Good to know before installing
- The treemap view takes a little getting used to.
- It does not suggest what to delete; the decision is yours.
- It runs on Windows only.
How to install
Windows
- Click the official download button on this page.
- Extract the downloaded archive to a folder.
- Run SpaceSniffer.exe and choose the drive you want to scan.
Alternatives
- WinDirStat
- TreeSize Free
- WizTree (Free for personal use)
Frequently asked questions
Is SpaceSniffer free?
Yes. It is a free program.
Does it need to be installed?
No. You can run the extracted file directly.
Is it safe to delete the large files I find?
For your own files, yes. Do not delete files in the Windows or program folders; remove unwanted programs through Settings instead.