See where your disk space went.

Diskflag is a disk space analyzer for Windows 10 and 11. It maps your whole drive and marks what's safe to clear in pink, so you know exactly what to delete.

Buy Diskflag for $8What it finds
  • Windows 10 and 11
  • One payment, no subscription
  • Works offline
Diskflag

One map of everything on your drive.

Every folder is a tile, sized by the space it takes. Click one to zoom in, and hover for its size, file count and when it last changed.

  • Safe to clearCaches, temp files and crash reports that apps rebuild on their own.
  • Worth reviewingOld projects, installers, big videos and games you could move to another drive.
  • Managed by WindowsThe page file, hibernation and update leftovers, with the Windows setting that shrinks each one.
Diskflag zoomed into the AppData folder: npm cache, Temp, Chrome caches and Python caches are marked pink, with a list of what to clear beside the map

What it found on a sample 1 TB drive.

A full gaming and coding PC with 9.3 GB left. Diskflag found 71 GB that's safe to clear right away, and a lot more worth a second look.

Safe to clear 71 GBWorth reviewing 497 GBManaged by Windows 86 GB
The confirm dialog listing nine items and 25.5 GB to move to the Recycle Bin

Cleanup you can undo.

Tick what you want gone and Diskflag moves it to the Recycle Bin, so anything can come back. You empty the bin when you're sure.

Windows stays intact

System folders, Program Files and your profile folders can't be removed from Diskflag. For space Windows manages, it opens the right Windows setting instead.

It says how, not just what

For caches with their own cleanup command, like npm, pip or Docker, it shows the exact command to run and copies it for you.

Your files stay on your PC

No account, no upload, no internet connection needed. Everything Diskflag looks at stays on your PC.

Light or dark, every drive.

Diskflag follows your Windows theme and maps every drive in your PC. A full scan of a 1 TB drive takes a few minutes, and the map fills in while it runs.

Diskflag in dark mode showing the whole C: drive
The whole C: drive, in dark mode.
Diskflag showing a second drive full of games, photos, video projects and backups
A second drive with games, photos and backups.
$8once
  • Maps every drive in your PC
  • Flags caches, temp files, old installers and more
  • Moves what you pick to the Recycle Bin
  • Works offline, no account
  • Windows 10 and 11, 64-bit
  • 14-day refund, no questions asked
Buy Diskflag for $8

Questions

Does Diskflag delete anything by itself?

No. It only moves what you select to the Recycle Bin, after you confirm. Windows folders, Program Files and your main profile folders can't be removed at all.

Why does Windows warn me the first time I open it?

Windows SmartScreen shows a notice for new apps it hasn't seen many times yet. Choose More info, then Run anyway.

Does it work on a Mac?

No. Diskflag is built for Windows 10 and 11.

How long does a scan take?

About 3.5 minutes for a full 1 TB drive with 4.9 million files, and less on a rescan. The result is saved, so the next time you open Diskflag the map is there instantly.

Does it send my data anywhere?

No. Diskflag runs entirely on your PC and doesn't need an internet connection.

How big is it?

A 12 MB download. Unzip it and run Diskflag.exe; there's nothing to install.

What if it's not for me?

Email scottfoster@velorank.net within 14 days of buying and you'll get a full refund, no questions asked. The details are in the terms.