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Kami958/WhoShitsonMyC

A lightweight Windows tool that takes disk scan snapshots and compares them to show which folders grew between two points in time.

Open-source alternative to:WinDirStatTreeSize

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Last commit
9 days ago

What is it?

WhoShitsOnMyC helps find out where disk space went after you have already cleaned a drive. You scan a directory such as C:\ while the space is in a known state to create a baseline snapshot, then scan the same directory again later. Comparing the two snapshots shows which folders grew or newly appeared, with growth shown in red and shrinkage in green.

It ships as a single exe on Windows 10 and 11 and uses Microsoft Edge WebView2 for its interface, which is preinstalled on most Windows 10 and 11 systems. Running as administrator allows scanning of root drives faster and access to some hidden paths, and an MFT scanning option is available for root drive scans. Scan threads, snapshot compression and snapshot storage location can be adjusted in settings.

Snapshots and settings are stored under %LOCALAPPDATA%\WhoShitsOnMyC by default. The project is licensed under GPL-3.0 and includes an in-app uninstall that removes this local data.

Key features

  • 01Compares two snapshots of the same directory to highlight growth and new folders.
  • 02Ships as a single exe with no installer or background service.
  • 03Supports optional MFT scanning for root drives when running as administrator.
  • 04Offers Chinese and English interfaces, plus dark and light themes.
  • 05Lets you import, open and refresh saved snapshots, and change where they are stored.

Use cases

  • Finding out which folders filled up C: after a cleanup a few days earlier.
  • Tracking space growth on a drive that you manage manually.
  • Comparing scans run as a normal user and as administrator to see access-related differences.

Quick start

  1. 1

    Download the program from the Releases page

  2. 2

    Install Microsoft Edge WebView2 if the program reports it is missing

  3. 3

    Run the exe as administrator and create a scan of a folder such as C:\

Things to know

  • Windows 10 and 11 only.
  • Requires Microsoft Edge WebView2 for its interface.
  • Some paths need administrator rights, and incomplete scans cannot be compared.
  • Licensed under GPL-3.0, a copyleft license.

In collections

Windows apps and utilities

Topics

#disk-usage#windows#disk-space#snapshot#file-system#python

FAQ

What is WhoShitsonMyC?
A lightweight Windows tool that takes disk scan snapshots and compares them to show which folders grew between two points in time. WhoShitsOnMyC helps find out where disk space went after you have already cleaned a drive. You scan a directory such as C:\ while the space is in a known state to create a baseline snapshot, then scan the same directory again later. Comparing the two snapshots shows which folders grew or newly appeared, with growth shown in red and shrinkage in green.
Is WhoShitsonMyC free to use? What license does it have?
WhoShitsonMyC is open source under the GPL-3.0 license. Check the license terms before using it in commercial products.
Is WhoShitsonMyC still maintained?
Actively maintained. The last commit to WhoShitsonMyC was on Oct 30, 2026.
What can I use WhoShitsonMyC for?
Finding out which folders filled up C: after a cleanup a few days earlier. Tracking space growth on a drive that you manage manually. Comparing scans run as a normal user and as administrator to see access-related differences.
How do I install WhoShitsonMyC?
Download the program from the Releases page Install Microsoft Edge WebView2 if the program reports it is missing Run the exe as administrator and create a scan of a folder such as C:\
Where can I get WhoShitsonMyC?
The source code and installation instructions are on GitHub: https://github.com/Kami958/WhoShitsonMyC

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