SpaceSnifferSpaceSniffer on Windows 10
The current 64-bit portable SpaceSniffer build supports Windows 10 with no installation process.
Read step-by-step guideTrack down storage-heavy folders with the classic SpaceSniffer treemap view. The current official x64 build stays portable, filter-driven, and fast to scan even while you keep drilling deeper into the drive.
SpaceSniffer maps files and folders into a zoomable treemap. A large rectangle signals a large footprint; it does not automatically mean the file should be deleted. Start by scanning, filtering and verifying the path in Windows Explorer.
Choose a Windows volume and watch the treemap build while the scan proceeds.
Click and zoom into the largest folders to see exactly where space is used.
Use extension, age, size or tag filters, then review each file before any deletion.
Release dated March 25, 2026. Current SpaceSniffer builds are x64 and require ZIP extraction, not a conventional installation wizard. The developer publishes the release archive and checksums on its download pages.
Use the exact guide for your goal — from finding the largest folders to checking inaccurate scan totals.
The current 64-bit portable SpaceSniffer build supports Windows 10 with no installation process.
Read step-by-step guideThe current official 2.2.x SpaceSniffer release is x64; older 1.3 releases are a separate legacy branch.
Read step-by-step guideA damaged download or blocked archive extractor can prevent SpaceSniffer from starting.
Read step-by-step guideRectangle area represents file or folder size: larger blocks account for more of the scanned storage.
Read step-by-step guideDouble-clicking a SpaceSniffer rectangle zooms into that folder's contents.
Read step-by-step guideReturn to parent views to compare nested directories after inspecting one folder.
Read step-by-step guideSome protected Windows directories reject reads under standard-user permissions.
Read step-by-step guideLarge directories, slow disks, inaccessible paths, and reparse points may delay an apparent scan.
Read step-by-step guideSpaceSniffer 2.2.0.27 includes a fix for a potential infinite loop involving reparse points.
Read step-by-step guideYes. Uderzo describes SpaceSniffer as freeware with donations welcome.
Yes. The developer lists Windows 10 and Windows 11 as tested for the current x64 release.
SpaceSniffer analyzes and visualizes space. You must decide what to remove and verify backups before deleting files.
Yes. Extract its ZIP and launch the executable; it does not need a conventional installer.