Alternatives to FolderSizes

A Windows disk space analyzer that reports folder sizes and finds large, old and duplicate files. The listings below can replace it for an important use case. Each note says what changes if you switch.

  • FolderSizes

    A Windows disk space analyzer that reports folder sizes and finds large, old and duplicate files.

    FreemiumProprietaryWindows

Replacements

Listings that take over the same core job as FolderSizes.

  • TreeSize Free

    Shows which folders are eating a Windows drive, ranked largest first, without a scan that takes all afternoon.

    FreemiumProprietaryWindows

    TreeSize Free reads the NTFS master file table for fast scans and is free for commercial use, but reports, exports and duplicate search need a paid edition.

  • DiskSavvy

    A Windows disk space analyzer that classifies files on local disks, network shares and NAS devices.

    FreemiumProprietaryWindowsCommand line

    DiskSavvy also analyses network shares and NAS devices on Windows, adding file classification charts, a command-line utility and a server edition, with advanced features paid.

  • WizTree

    Finds what is eating a Windows disk in seconds by reading the NTFS master file table directly.

    FreemiumProprietaryWindows

    WizTree scans NTFS drives in seconds with a treemap, duplicate finder and CSV export, but lacks scheduled reports and needs a paid licence for commercial use.

  • WinDirStat

    Draws your whole drive as a treemap, so a single 40 GB file is a huge rectangle you cannot miss.

    FreeOpen sourceWindows

    WinDirStat is free GPL-2.0 software for Windows with a treemap and hash-based duplicate search, but no scheduled email reports or trend analysis.

  • SpaceSniffer

    Shows disk usage as a treemap you click into, so the biggest folders and files are immediately obvious.

    FreeProprietaryWindows

    SpaceSniffer is free portable Windows freeware showing a live treemap, without FolderSizes' scheduled reports, trend snapshots or export formats.

  • Filelight

    Shows disk usage as concentric rings you can click into.

    FreeOpen sourceWindowsLinux

    Filelight is GPL-2.0 open source for Windows and Linux, scans network locations and shows clickable rings, though it pulls in KDE libraries.

  • QDirStat

    A Qt-based graphical disk usage analyser with a directory tree and treemap view.

    FreeOpen sourcemacOSLinux

    QDirStat is GPL-2.0 open source with a treemap and tree view on Linux and macOS, and it has no Windows version.

  • Duc

    A set of tools that index disk usage into a database and show it in several interfaces.

    FreeOpen sourceLinuxCommand line

    Duc moves the job to Linux, indexing very large filesystems into a database with console, graphical and web interfaces, though results reflect the last index run.

Similar software

Related functionality, not a direct replacement.