WinDirStat Reviews

Disk Space Visualizers

about WinDirStat and MindGems Folder Size, SpaceSniffer, SpaceMonger · · Helpful Not helpful 9 Helpful Report as spam

Quick, bullet-points review.

Winner: Space Sniffer.


  • Informative visualization of space used by directories and files
  • Full file delete support
  • Good User Interface
  • Fast Scanning

Visualization Types

  • Hierarchical Cake Diagram
  • Cake Diagram
  • (Hierarchical) Treemap
  • Absolute Bar Chart
  • Relative Bar Chart

WinDirStat (3/5)
+++ Both relative bar charts and a treemap

  • File type based statistics
  • Sometimes unresponsive while scanning
  • Quite ugly
  • Visualization sometimes very slow
    -- Does not monitor disk for changes
    -- I find it hard to use the treemap for anything but finding single, large files
    -- Sometimes reports wrong sizes (happened to me in Divx player cache directory, anybody got an explanation?)
    -- Can only delete single files / directories
    --- Slow! (~ 4 minutes for my C drive)

Mind Gems Folder Size (2/5)
++ Useful, good-looking and informative non-hierarchical cake chart + relative/absolute bar charts

  • Ads in toolbar (for developers software)
  • Delete function disabled while scanning, should be possible if current directory is completely scanned
    -- Does not monitor changes on disk
    -- No hierarchical visualization (treemap / hierarchical cake) at all.
    -- Sometimes deleted items do not disappear properly (only after F5)
    --- Slow! (~ 5 minutes for my C drive)

SpaceSniffer (4/5)
+++ Treemap-Visualization with adjustable detail, navigation, labels (what WinDirStat wanted to do)
+++ FAST Scanning
++ Gives you full explorer context menu

  • Powerful filtering (not very comfortable to use)
  • Tagging
  • Active Development
    ~ Donation Button, non-obstrusive
    ~ No installation
  • URL in Window Title (ugly!)
    -- No simple bar chart visualization possible.
    -- Can only delete single files / directories
    -- No "open explorer here" if not included in explorer context menu
    Tip: Disable distracting Mouse Trail
    Tip: Disable Console Popup
    Tip: Enable File Type highlighting

TreeSize (4/5)
++ Simple!
++ Quite fast scanning

  • Simple filtering
  • Can also display File Count etc.
  • Explorer Bar Chart visualization well executed
    ~ Software Ads, non-obstrusive
  • Can only delete single files / directories
    -- No other visualization options

SpaceMonger (2/5)
++ Favorites
++ Statistics

  • Multiple File selection
  • Fast!
  • Ugly
    -- Awkward
    --- 30 Day trail :(

jDiskReport - No delete function => no rating
++ Savable scans
++ Statistics (Type, Size, Date)

  • Also visualizes file count per folder
  • Java Interface (ugly!)
    -- Slow!
    --- No delete function at all

OverDisk - No delete function => no rating
+++ Beautiful, exact display of folder size structures using hierarchical
-- Does not monitor hard disc
-- Hard to get a quick overview since diagram does not contain labels (only mouse-over)
--- No delete function built-in

Best Speed: Space Sniffer
Best Non-Hierarchical Visualization: Folder Size
Best Hierarchical Visualization: Space Sniffer
Best User Interface: Space Sniffer
Best Delete Behavior: Space Monger

Folder Size (by Brio) - Only works for 2000 & XP
Sequoia View - Original Treemap implementation, very basic
Xinorbis - Failed to start
Disk Space Fan - Huge interface delays

Also many advanced filemanagers support basic display of folder sizes or even visualization, like FAR, FreeCommander, TotalCommander.


Thank you so much for this review. You saved so many people's precious times.
(I created an account here just to say this)

Thank you for spending your time to test then review those softwares ;-)

thank you!

I love it

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I love the way WinDirStat displays usage graphically.
But FreeFileSync also shows disk usage if you enter a path and click compare. I find I don't really need both.

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Network drive scan is very useful.

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WinDirStat is awesome, it's useful, fast, responsive, light, small, has a good UI, and on top of that it's open source!


Give SpaceSniffer a try

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I came here to find an alternative of the nice GNOME Disk Usage Analyzer (Baobab) for Windows systems. WinDirStat is open source but it's a million times more messy than SpaceSniffer.

SpaceSniffer is portable, and it shows the folders where the files are in the graph! It's simpler to use and visualize your disk in the way you organized it: in folders. You can visually explore your disk with single or double-clicking the folders.


Looks like the same thing but not open source. I'd stay away.

Without a competent open source alternative SpaceSniffer will be my option. I've been using it for a long time without issues.

I wouldn't trust you to be capable of identifying issues tbh

Yeah, sure, my whole HDD is being uploaded to terrorists, definitely. </irony>

Hangs on disks with a lot of hard links

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Windirstat, Spacesniffer, and SequiaView all hang part way through the analysis of my 2ooGB disk that has a lot of hard links.

I don't know if the hard links are the problem but that sems to be the only significant difference between this disk and disks on which all three work.


Try FolderSizes - not free, but very robust and doesn't suffer from such limitations.

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Classic UI, slow speed

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It's PERFECT !!!

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It's free, does remote folder scanning and works well.

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One of the primary features I am looking for is the ability to hide files/directories so the treemap can be remade without that file taking up a lot of space.

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After years of using it have to give up. It was really slow to the point of freezing when dealing with C:\windows\winsxs folder ca. 6.5 GB.
Not recommended anymore as the product is obviously defunct.
The two alternatives to recommend are right now TreeSize and SpaceSniffer. Everyone interested in this kind of programs should really try both as they approach the problem differently, one with trees the other with boxes. Both are though super speedy, something WinDirStat never was.
In SpaceSniffer you get to double click on the top edge of a box to get show one level deeper in the box. Also the keys are working, back arrow, top arrow etc
Also deleting something automatically refreshes the disk view, again something missing in WinDirStat where you had to manually scan once again.
TreeSize does it hierarchically and provides all the info columns one could want. In Spacesniffer you get the info in tooltips(size, when was created, in case of folders how many items).
In TreeSize too is deleting possible, auto-refresh is present so is fast scanning.
Both highly recommended while WinDirStat not anymore. I myself have to decide which of the two is to keep until then they are both.


At some points, u are true! If u wanna other external or internal hdd scan, works like normal, yeah, its slow after some years, but I am not so angry, It's not recommend for scanning C drive, use Space Monger instead of WinDirStat ( )

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As of January 2018 it is still being developed. The mark of "discontinued" is inaccurate. Builds can currently be found on BitBucket

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Does exactly what it should a t a fast speed (also on Windows 10). The user interface is by no mean beautiful, but functional.