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SPECIFICTION
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DiskSizer

disksizer.whhite.com

Free plan Windows
Visit disksizer.whhite.com
Spec score 7.6 #70 of 105 in Disk Space Analyzers

Spec sheet

Purpose
DiskSizer is a Windows disk space analyzer for seeing what is using storage across drives.Read 12 Oct 2026 · disksizer.whhite.com
Platforms
The product is described as a Windows desktop app built with Electron 28.Read 12 Oct 2026 · disksizer.whhite.com
Free plan
YesRead 22 Sep 2026 · disksizer.whhite.com
Support
The site links to GitHub Issues for reporting issues.Read 12 Oct 2026 · disksizer.whhite.com
Charts
It offers interactive D3 sunburst and treemap views that visualize files and folders in proportion to their size and support directory drill-down.Read 12 Oct 2026 · disksizer.whhite.com
Distribution
The site describes DiskSizer as free forever and open source, and links to its GitHub repository for download.Read 12 Oct 2026 · disksizer.whhite.com
Drive detection
DiskSizer auto-detects drive type through WMI.Read 12 Oct 2026 · disksizer.whhite.com
HDD scanning
On HDDs, a native C++ addon uses Windows FindFirstFileExW to read file sizes from directory entries without per-file stat() calls.Read 12 Oct 2026 · disksizer.whhite.com
Intended audience
The site presents DiskSizer as a tool for understanding disk usage and reclaiming storage on Windows.Read 12 Oct 2026 · disksizer.whhite.com
Performance
The site reports 1.18× faster scans on large trees of 3M or more files, 1.92× faster scans on smaller directories, and 73% lower heap usage.Read 12 Oct 2026 · disksizer.whhite.com
Scan progress
A progress overlay shows files and sizes accumulating while a scan runs.Read 12 Oct 2026 · disksizer.whhite.com
Scan scope
files_foldersRead 22 Sep 2026 · disksizer.whhite.com
Scanner design
Its In-Memory First scanner keeps 64 directory read requests in flight simultaneously; on SSDs it runs with unlimited parallelism.Read 12 Oct 2026 · disksizer.whhite.com
Technology
The listed stack includes Electron 28, React 18, D3 v7, a C++ N-API addon, TypeScript, and Tailwind CSS.Read 12 Oct 2026 · disksizer.whhite.com
Treemap view
YesRead 22 Sep 2026 · disksizer.whhite.com

Plans and prices

Free Free Free forever · open source Read 12 Oct 2026 · disksizer.whhite.com

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