WizTree scans a Windows drive and shows exactly which files and folders are using the most space, sorted largest-first with a visual treemap. What sets it apart from older disk space tools is speed: on an NTFS drive it reads the Master File Table directly instead of walking the folder structure file by file, so a scan that takes minutes in other tools finishes in seconds here.
Why WizTree Is So Much Faster Than Alternatives
Traditional disk space analyzers ask Windows for every file and folder one at a time, which is slow on drives with hundreds of thousands of files. WizTree reads the NTFS Master File Table (MFT) directly — the same low-level index Windows itself uses — so it can list every file and its size on a drive with millions of files in a matter of seconds rather than minutes.
This MFT-reading approach only works on NTFS-formatted drives with administrator access; scanning a non-NTFS drive (like a FAT32 USB stick) or a network share falls back to a normal, slower file-by-file scan, same as any other tool.
WizTree Features
- Near-instant scans on NTFS drives via direct Master File Table reading
- Visual treemap showing space usage at a glance, click to drill into any folder
- Sortable file list by size, so the biggest space users surface immediately
- Built-in file deletion straight from the results, with a confirmation step
- Duplicate-friendly sorting to help spot old installers, logs and cache folders worth clearing
- Command-line and export options (CSV) for scripting or reporting
- Portable version available, no installation required
How to Install WizTree
- Open the official download page. The button on this page opens diskanalyzer.com directly.
- Choose the installer or the portable ZIP — the portable version needs no installation and can run from a USB drive.
- Run WizTree as Administrator for the fast MFT-based scan of your system drive; without elevated rights it falls back to a normal scan.
- Select a drive from the dropdown and click Scan — results for a typical drive appear within seconds.
- Click through the treemap or sorted list to find and clean up the largest space users.
Is WizTree really free?
Free tier. WizTree is free for personal, non-commercial use. A separate paid Pro licence exists for business/commercial deployment and scanning network drives at full MFT speed — the free version covers local NTFS drives for personal use.
How to download WizTree safely
Use the request button on this page and we will email you the current link for www.diskanalyzer.com — the publisher's own website — so you receive the authentic build. We do not host, mirror, patch or repackage this software in any way.
Avoid third-party "download manager" sites offering WizTree. They commonly wrap the genuine installer in their own bundler, which is how adware and browser hijackers get onto a machine that the user believed was clean.
Alternatives to WizTree
Other free system utilities software worth comparing before you decide:
Everything
Instant filename search for Windows, indexing an entire drive in seconds.
CCleaner Free
Free system cleanup and temporary file removal tool.
HWMonitor
Free hardware monitoring for temperatures, voltages and fan speeds.
Frequently asked questions
Is WizTree really free?
Yes, for personal use. The standard download is free with no time limit; a Pro edition exists specifically for commercial/business use and adds network-drive scanning speed, similar to how CCleaner offers a free tier alongside a paid Professional edition.
Why does WizTree need administrator rights?
Reading the NTFS Master File Table directly — the trick that makes WizTree so fast — requires low-level disk access that Windows only grants to an elevated (Administrator) process.
Does WizTree work on non-NTFS drives?
It will scan them, but without MFT access it falls back to a normal folder-by-folder scan, so the dramatic speed advantage only applies to NTFS-formatted local drives.
Is WizTree safe — does it delete files automatically?
No file is deleted automatically. WizTree only scans and reports by default; deletion is a separate, deliberate action you take from the results list with a confirmation prompt.
How is WizTree different from Windows' own Storage settings?
Windows' built-in Storage view gives broad categories (Apps, Documents, Temporary files); WizTree shows the actual file and folder tree with exact sizes, which is far more useful for finding specifically what is filling a drive.
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