I often administer Windows computers, and I regularly run into the same situation: the C or D drive is almost full, but it is not clear what is taking up all the space.

Finding large files and folders manually through Windows File Explorer is inconvenient. You have to check folder properties, wait for Windows to calculate the size, and then repeat the same process again.

So I wrote a small script-based program called Disk Size Analyzer to make this job easier, and I am sharing it with you.

Disk Size Analyzer scans an entire drive or a selected folder and shows what is using the most disk space.

The largest folders are displayed on the left, while the largest files are displayed on the right. Everything is sorted by size, so the biggest items appear at the top.

Every result has an Open Folder button, allowing you to immediately open its location in Windows File Explorer.

Download the ZIP archive and completely extract it into a separate folder. Do not run the program directly from inside the archive.

For a normal start, run:

To start without a command-line window, run:

After the scan, you will immediately see which files and folders are taking up the most disk space.

When scanning the system drive C:\, you can run the program as administrator so it can access more protected Windows folders.

No installation is required. The interface is available in 20 languages, including English, Russian, German, French, Spanish, Chinese, Japanese, Korean and Ukrainian.

I recently started publishing my programs and source code on GitHub. My other projects are available here:

https://github.com/APTOFI-dev/