Alternatives to Filelight
Shows disk usage as concentric rings you can click into. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Filelight
Shows disk usage as concentric rings you can click into.
Replacements
Listings that take over the same core job as Filelight.
WinDirStat
Draws your whole drive as a treemap, so a single 40 GB file is a huge rectangle you cannot miss.
WinDirStat is a Windows-only GPL-2.0 tool using a treemap instead of rings, adding duplicate finding by hash and saved scans.
WizTree
Finds what is eating a Windows disk in seconds by reading the NTFS master file table directly.
WizTree reads the NTFS master file table for very fast Windows scans with treemap and list views, but is closed source and paid for commercial use.
SpaceSniffer
Shows disk usage as a treemap you click into, so the biggest folders and files are immediately obvious.
SpaceSniffer is closed-source Windows freeware with a live-updating treemap and file-type filters, offered only as a 64-bit portable build.
ncdu
A disk usage analyser with a text interface, built for finding what is filling a remote server you can only reach over SSH.
ncdu replaces the ring chart with a text interface that works over SSH on macOS and Linux, and allows deleting files in place.
gdu
Find large directories with a terminal disk-usage analyzer.
gdu is a terminal analyzer with parallel scans on Windows, macOS and Linux, avoiding KDE library dependencies but offering no graphical chart.
TreeSize Free
Shows which folders are eating a Windows drive, ranked largest first, without a scan that takes all afternoon.
TreeSize Free is a closed-source Windows tool with a size-sorted folder tree and fast NTFS scans, but no treemap picture in the free edition.
GrandPerspective
Treemap view of disk usage on macOS.
GrandPerspective moves to macOS with a treemap view and can compare saved scans to see what grew.
DaisyDisk
Interactive sunburst map of disk usage for macOS.
DaisyDisk is a paid macOS app with a similar interactive sunburst map and a holding area for confirmed batch deletion.
Also worth comparing
These listings name Filelight as their own alternative, so the relationship runs both ways.
Disk Usage Analyzer
A GNOME app that shows which folders are using disk space, as a tree and chart.
Filelight shows disk usage as clickable concentric rings, scans remote and network locations, and runs on Windows and Linux, but pulls in KDE libraries on GNOME desktops.
DiskSavvy
A Windows disk space analyzer that classifies files on local disks, network shares and NAS devices.
Filelight is GPL-2.0 open source for Windows and Linux, scans network locations too, and shows usage as clickable rings, though it pulls in KDE libraries.
FolderSizes
A Windows disk space analyzer that reports folder sizes and finds large, old and duplicate files.
Filelight is GPL-2.0 open source for Windows and Linux, scans network locations and shows clickable rings, though it pulls in KDE libraries.
K4DirStat
A KDE utility that adds up disk usage for directory trees and shows it as a treemap.
Filelight shows usage as clickable concentric rings rather than a treemap, runs on Windows and Linux, and scans network locations.
QDirStat
A Qt-based graphical disk usage analyser with a directory tree and treemap view.
Filelight shows usage as clickable concentric rings rather than a treemap, runs on Linux and Windows, and pulls in KDE libraries.
Similar software
Related functionality, not a direct replacement.
