Changelog

All notable changes to Diskat are documented here. The format is based on Keep a Changelog, and the project uses Semantic Versioning.

1.0.0 - 2026-10-20

First public release.

Windows 10/11, 64-bit: Diskat.exe (60.7 MB, portable). SHA-256: 5f24ff3a3a53255f97fcd8c9b3e870d15db72cedb973c09fe2b1be11004e2590

Parallel scanner: multi-threaded directory enumeration with no per-file allocations; about 2 million files in 15 seconds on an SSD.
Live results while scanning: sizes update every 200 ms and the heaviest folders are re-sorted to the top every second.
Folder tree with size, "% of parent" bar, file and folder counts and modified date; sortable by any column.
Space map (squarified treemap, two levels deep): click to select, double-click to drill in, ↑ to go back up.
Largest files tab listing the top 500 files of the scan, with multi-select delete.
Delete to the Recycle Bin (Del) or permanently (Shift+Del), always behind a confirmation dialog that shows the full path and size.
Rescan a single folder with F5 without rescanning the whole drive.
Run as Admin button to include protected system folders.
11 interface languages: English (default), Vietnamese, Simplified Chinese, Japanese, Korean, Spanish, Portuguese, German, French, Russian and Indonesian, picked from a menu and remembered between runs.
Drive cards with used / free space for every ready drive.
Command-line argument to scan a folder on startup: Diskat.exe "D:\Projects".
Single self-contained Diskat.exe (no .NET install needed) and an MSIX package for the Microsoft Store.

Junctions and symbolic links are shown but never followed, so nothing is counted twice and scans can't loop.
Protected from deletion: drive roots, Windows (and everything inside it), Program Files, Program Files (x86), ProgramData, ProgramData\Microsoft, the Users folder, every user profile root, AppData\Roaming and AppData\Local. Checks are applied to the real path too, so a subst drive or a junction can't be used to get around them.
Permanent delete clears read-only attributes only inside the folder being deleted and never walks through junctions or symlinks.
Names ending in a dot or a space (which Windows APIs silently rewrite, e.g. foo. becomes foo) are skipped by the scanner and refused for deletion, so the wrong item can never be deleted.
The confirmation dialog warns when a folder wasn't fully scanned (scan stopped or access denied), because its real size may be larger than shown.
Only one delete or rescan runs at a time; keyboard shortcuts are blocked while it runs.