Freedom251 › Disk Space Analyzers
SpaceSniffer
What SpaceSniffer is
SpaceSniffer is a portable Windows disk-space analysis tool that displays files and folders as a treemap. Its scan scope covers files and folders, letting you select a folder, reveal its contents, and zoom into a smaller area. File-type breakdowns provide another way to inspect storage. Filters can match file types, sizes, dates, or temporary four-color tags; conditions can be combined or excluded. During a scan, you can keep navigating, open several filtered views of the same media, or perform a secondary scan on a zoomed area. The program reacts to file-system events by blinking changed elements and can scan NTFS Alternate Data Streams. Its export module creates customizable text reports from filtered results. SpaceSniffer runs read-only, needs no installation, and stores configuration in a plain XML file. Windows Explorer context-menu and command-line launching are documented. The current download page lists an x64 release tested on Windows 7, 8, 10, and 11. It is free for personal and commercial use.
Who it suits
It suits Windows users who want a visual way to inspect disk usage and filter files by several properties. Administrators may also value its NTFS scanning, command-line launch, and Explorer integration.
What it does well
- Treemap view shows folder and file space use
- Filters combine file types, sizes, dates, and tags
- Exports customizable text reports
- Portable, with no installation required
- Read-only scanning mode
What to know first
- Windows-only platform
- May be too simple for complex statistics
- Declining privilege request shows less detail
- No free trial listed
Limits
SpaceSniffer is free for personal and commercial use. The maker says it may be too simple for users who need complex statistical functions; declining backup operator privilege shows less detail.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Freeware | Free for personal and commercial use · Portable application · Donations accepted | On request |
| SpaceSniffer | Free for personal and commercial use · donations welcome | Free |
As uderzo.it lists them, read 16 Sept 2026. The maker's own page has the final word.
Getting started
- Visit the SpaceSniffer website.
- Download the x64 release for Windows.
- Place the executable wherever you want; installation is not required.
- Run the executable and grant backup operator privilege for access to most files.
- Optionally add SpaceSniffer to the Windows Explorer folder context menu or launch scans from the command line.
Verdict
SpaceSniffer focuses on visual storage inspection, with filtering, tagging, reporting, and navigation during scans. Its portable, read-only design suits straightforward Windows disk analysis, while users needing complex statistical functions may find it limited.
Questions
How much does SpaceSniffer cost?
The SpaceSniffer plan is free. Donations are welcome.
Is there a free plan or trial?
SpaceSniffer is free for personal and commercial use. There is no free trial.
Which platforms does SpaceSniffer support?
Windows is the listed platform. The current download page lists an x64 release tested on Windows 7, 8, 10, and 11.
Does SpaceSniffer need to be installed?
No. It is portable and can be run by placing the executable wherever desired.
Is SpaceSniffer open source?
The listed facts do not describe SpaceSniffer as open source.
Facts from SpaceSniffer's own pages
- Configuration
- The maker says SpaceSniffer uses a plain XML configuration file and does not clutter the Windows registry. · uderzo.it, 11 Oct 2026
- Exportable reports
- Yes · uderzo.it, 16 Sept 2026
- File system changes
- SpaceSniffer reacts to file system events during scans and signals changes by blinking elements. · uderzo.it, 11 Oct 2026
- File-type breakdown
- Yes · uderzo.it, 16 Sept 2026
- Filtering
- Filters can match file types, sizes, dates, and tags, and can be combined or used to exclude matches. · uderzo.it, 11 Oct 2026
- Free plan
- Yes · uderzo.it, 16 Sept 2026
- Navigation
- Users can select folders to reveal their contents and zoom into them for a larger view. · uderzo.it, 11 Oct 2026
- Notable limit
- The maker says SpaceSniffer may be too simplistic for users who need complex statistical functions. · uderzo.it, 11 Oct 2026
- NTFS support
- SpaceSniffer can scan NTFS Alternate Data Streams. · uderzo.it, 11 Oct 2026
- Platform
- The current download page lists an x64 release tested on Windows 7, 8, 10, and 11. · uderzo.it, 11 Oct 2026
- Desktop platforms
- windows · uderzo.it, 16 Sept 2026
- Portability
- SpaceSniffer requires no installation and can be run by placing the executable wherever desired. · uderzo.it, 11 Oct 2026
- Purpose
- SpaceSniffer is a portable disk space analysis tool that visualizes the folder and file structure of disks as a treemap. · uderzo.it, 11 Oct 2026
- Reports
- The export module creates customizable textual reports from filtered search results. · uderzo.it, 11 Oct 2026
- Scanning
- Users can navigate during a scan, open multiple filtered views of the same media from one scan, and refine a zoomed area with a secondary scan. · uderzo.it, 11 Oct 2026
- Scan scope
- files_folders · uderzo.it, 16 Sept 2026
- Security
- The maker says SpaceSniffer runs in read-only mode and requests backup operator privilege to access most files; declining the request shows less detail. · uderzo.it, 11 Oct 2026
- Tagging
- Users can temporarily tag files with four colors and filter by those tags. · uderzo.it, 11 Oct 2026
- Treemap view
- Yes · uderzo.it, 16 Sept 2026
- Windows integration
- The maker documents adding SpaceSniffer to the Windows Explorer folder context menu and launching scans from the command line. · uderzo.it, 11 Oct 2026
Where SpaceSniffer stands on Freedom251
- Disk Space Analyzers#36 of 105
- Disk Cleanup Software#10 of 22