DiskSizer
The facts below are what the maker publishes about DiskSizer, checked and dated. Our editors have not written about it yet.
Plans and prices
From DiskSizer's own pricing page, checked 12 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | Free forever · open source |
The facts
Each one read from DiskSizer's own pages, with the date it was checked.
What it does
- Charts
- It offers interactive D3 sunburst and treemap views that visualize files and folders in proportion to their size and support directory drill-down.checked 12 Oct 2026
- Distribution
- The site describes DiskSizer as free forever and open source, and links to its GitHub repository for download.checked 12 Oct 2026
- Drive detection
- DiskSizer auto-detects drive type through WMI.checked 12 Oct 2026
- HDD scanning
- On HDDs, a native C++ addon uses Windows FindFirstFileExW to read file sizes from directory entries without per-file stat() calls.checked 12 Oct 2026
- Intended audience
- The site presents DiskSizer as a tool for understanding disk usage and reclaiming storage on Windows.checked 12 Oct 2026
- 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.checked 12 Oct 2026
- Purpose
- DiskSizer is a Windows disk space analyzer for seeing what is using storage across drives.checked 12 Oct 2026
- Scanner design
- Its In-Memory First scanner keeps 64 directory read requests in flight simultaneously; on SSDs it runs with unlimited parallelism.checked 12 Oct 2026
- Scan progress
- A progress overlay shows files and sizes accumulating while a scan runs.checked 12 Oct 2026
- Scan scope
- files_folderschecked 22 Sep 2026
- Support
- The site links to GitHub Issues for reporting issues.checked 12 Oct 2026
- Technology
- The listed stack includes Electron 28, React 18, D3 v7, a C++ N-API addon, TypeScript, and Tailwind CSS.checked 12 Oct 2026
- Treemap view
- Yeschecked 22 Sep 2026
Where it runs
- Desktop platforms
- windowschecked 22 Sep 2026
- Platforms
- The product is described as a Windows desktop app built with Electron 28.checked 12 Oct 2026
Money
- Free plan
- Yeschecked 22 Sep 2026
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