About WizTree

The story behind one of the fastest disk space analyzers on Windows, and why we built this resource.

WizTree is a disk space analyzer for Windows that scans entire hard drives in seconds. Unlike most similar tools that crawl through folders one by one, WizTree reads the NTFS Master File Table (MFT) directly. The result: a complete breakdown of every file and folder on your drive, displayed as both a sortable tree view and a colorful treemap, often before you have time to blink. For system administrators, IT professionals, and everyday Windows users running low on disk space, WizTree has become one of the go-to tools for understanding what is eating up storage.

How WizTree Started

WizTree was born out of a practical frustration. Its creator, Craig Barkhouse, had been using WinDirStat for years to find large files on disk. WinDirStat worked fine, but scanning a big drive could take five, ten, even twenty minutes. Craig knew that the NTFS file system stores a complete index of every file in its Master File Table, and he wondered: why not just read that index directly instead of walking through every directory?

That simple idea turned into WizTree. The early versions proved the concept worked. Drives that took WinDirStat 15 minutes to scan finished in WizTree within 5-10 seconds. Word spread through tech forums and sysadmin communities, and the user base grew steadily.

Early Development
Craig Barkhouse begins development at Antibody Software, focusing on direct MFT reading for NTFS volumes. First public release gains attention on tech forums.
Growing Adoption
Sysadmin communities on Reddit (r/sysadmin, r/msp) start recommending WizTree as the faster alternative to WinDirStat. Portable version released for USB drives.
Version 4.x
Major update adds support for non-NTFS drives (using a fast file system scan fallback), network drives, dark mode, and improved treemap rendering. Version 4.30 is the current release.

What WizTree Does

At its core, WizTree answers one question: where did all my disk space go? It gives you two ways to find out. The Tree View shows every folder sorted by size, so you can drill down from the root of your drive to the exact subfolder that is hoarding gigabytes. The Treemap View shows the same data visually, as colored rectangles proportional to file size, making it easy to spot large files at a glance.

NTFS MFT Scanning Reads the Master File Table directly for near-instant results on NTFS drives.
Treemap Visualization Color-coded rectangles sized by file/folder usage for quick visual identification.
File Type Breakdown Group files by extension to see which file types consume the most space.
Network Drive Support Scan mapped network drives and non-NTFS volumes with a fast fallback method.

WizTree runs on Windows 7 through Windows 11, supports both 32-bit and 64-bit systems, and weighs in at roughly 5 MB. It is free for personal use. Businesses and organizations that want to use it commercially can purchase an affordable license from the official site.

The Developer Behind WizTree

WizTree is built by Antibody Software Limited, a small software company run by Craig Barkhouse. Craig is a developer who has focused on building practical Windows utilities that solve real problems without unnecessary bloat. His approach with WizTree reflects that philosophy: do one thing, do it extremely well, and keep the interface simple.

Company
Antibody Software Limited
Creator
Craig Barkhouse
Official Site
diskanalyzer.com
License
Free (personal use), paid (commercial)
Current Version
4.30 (March 2026)

Why Users Rely on WizTree

Speed is the main reason people stick with WizTree. On Reddit threads comparing disk analyzers, the same comment appears over and over: “WizTree scans my drive before WinDirStat even finishes loading its progress bar.” Benchmarks from the community put WizTree at 22 to 46 times faster than WinDirStat on NTFS volumes. For IT professionals managing dozens or hundreds of machines, those seconds add up fast.

Beyond raw speed, users appreciate that WizTree is lightweight and portable. The portable version runs from a USB stick with no installation. There are no background services, no telemetry, and no subscription. It opens, scans, shows results, and gets out of the way.

System administrators use WizTree daily to identify runaway log files, bloated temp directories, and forgotten backup archives. Home users run it when their SSD starts filling up and they need to figure out what to delete. The tool has earned a loyal following because it reliably does its job without asking for anything in return.

About This Website

Independent Resource: This website is a fan-made, independent informational resource about WizTree. We are not affiliated with, endorsed by, or connected to Antibody Software Limited or Craig Barkhouse in any way.

Our goal is to help users find accurate information about WizTree, including download links, setup guides, and answers to common questions. All download links on this site point to the official source. We do not host, modify, or redistribute the software.

We respect the work Antibody Software has put into WizTree and encourage all users to support the developer. If you use WizTree in a business setting, please consider purchasing a commercial license from the official website at diskanalyzer.com.

Have questions or feedback about this site? We would be happy to hear from you.

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For official WizTree support, please visit diskanalyzer.com