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Notes from the squirrel
News, guides and behind-the-scenes notes from the developer of SquirrelDisk.
18 October 2026
Find duplicate photos and videos across your disks, and keep the right copy
SquirrelDisk 2.6 adds a duplicate finder. It compares folders, external drives, servers and cloud storage by content, shows how much space you get back, and lets rules decide which copy stays.
5 October 2026
How to see what's taking up space: treemaps, sunbursts and disk maps explained
A hard drive visualizer turns millions of files into one picture. Here is how treemaps and sunbursts work, how to read them, which one to pick, and how to try both for free on Mac, Windows and Linux.
5 October 2026
Is SquirrelDisk safe? What it reads, and what it never touches
SquirrelDisk is free, open source and scans your disk on your own computer. Here is exactly what it reads, what it sends over the network, how deleting works, and how to check all of it yourself.
5 October 2026
SquirrelTemp, SquirrelSetup.log and Squirrel.exe: what they are and how to clean them up
Found a SquirrelTemp folder, Squirrel.exe or SquirrelSetup.log on Windows? They come from the installer used by Discord, Slack, GitHub Desktop and other apps. Here is what each one does, and what you can safely delete.
Guides and comparisons
- SquirrelDisk for MacDisk space analyzer for Mac: SquirrelDiskSee what is taking up space on your Mac and free it up safely. Free, open source disk space analyzer for Apple silicon and Intel Macs.
- SquirrelDisk for WindowsDisk space analyzer for Windows 11 and 10: SquirrelDiskFind out what is taking up space on your C drive and clean it up safely. Free, open source disk space analyzer for Windows 10 and 11.
- SquirrelDisk for LinuxDisk usage analyzer for Linux with a GUI: SquirrelDiskA free, open source disk usage analyzer for Linux with a graphical interface. AppImage for x86_64, works on X11 and Wayland.
- Remote serversSee what's using disk space on a server over SSHScan a Linux server, NAS or remote Mac over SSH and explore it in the same sunburst chart as your own disk. Free and open source, no setup on the server.
- Cloud storageSee what's using space in S3, Google Drive and DropboxScan an S3 bucket, Google Drive, Dropbox, OneDrive or FTP server and see what fills it in an animated chart. Free and open source, powered by rclone.
- Disk Drill alternativeDisk Drill vs SquirrelDisk: duplicate finders and disk space tools comparedDisk Drill is a data recovery app with a free duplicate finder and disk cleanup. SquirrelDisk is a free, open source disk space app with a duplicate finder that works across disks, servers and cloud storage. Here's how they compare.
- Disk Inventory X alternativeDisk Inventory X alternative for Apple silicon and modern macOSDisk Inventory X hasn't been updated since 2019 and runs on Apple silicon only through Rosetta. SquirrelDisk is a free, open source treemap and sunburst disk analyzer that runs natively on M-series Macs.
- OmniDiskSweeper alternativeOmniDiskSweeper alternative: a visual way to free space on MacOmniDiskSweeper lists your folders by size. SquirrelDisk draws them as a sunburst or treemap, so the big ones jump out. Free and open source, for Mac, Windows and Linux.
- DaisyDisk alternativeDaisyDisk alternative: free and open source SquirrelDiskLooking for a free DaisyDisk alternative? SquirrelDisk shows your disk as an animated sunburst, is open source, and also runs on Windows and Linux.
- SpaceSniffer for Mac and LinuxSpaceSniffer for Mac and Linux: a free alternativeSpaceSniffer only runs on Windows. SquirrelDisk is a free, open source disk analyzer with a treemap view that runs on macOS, Linux and Windows.
- WinDirStat for MacWinDirStat for Mac: free alternatives that run on macOSWinDirStat is Windows only. These free Mac tools show what fills your disk, starting with SquirrelDisk, an open source analyzer for Mac, Windows, Linux.
- WizTree for MacWizTree for Mac: WizTreeMac and a free alternativeWizTree now has a Mac version, WizTreeMac. Here is how it compares with SquirrelDisk, a free, open source disk analyzer for Mac, Windows and Linux.