WizTree disk space analyzer: official download and licensing rules
Find what's filling a Windows drive in seconds, where to get the official download, and why WizTree is free at home but needs a paid license at work.
A server throws a low-disk alert, or a user’s laptop has no room for updates, and you need to know why right now. WizTree answers that question faster than anything else in the toolkit.
Quick links
| Tool | What it’s for | Business use | Official download |
|---|---|---|---|
| WizTree | Finding what’s filling a disk | Paid license per business site | diskanalyzer.com/download |
What it does
WizTree shows what’s using space on a drive, as a sortable list of files and folders plus a visual treemap where the biggest blocks jump out at you. On NTFS drives it reads the Master File Table directly instead of walking every folder one at a time, which is why a scan that takes other tools minutes usually finishes in seconds. It also handles hard-linked files correctly, so they aren’t counted twice.
When to reach for it
- A server or workstation is out of space and you need the culprit fast
- Hunting down runaway log files, forgotten ISO downloads, or old user profiles
- Finding a backup or export job that’s quietly writing somewhere it shouldn’t
- Checking a drive before a migration, so you’re not copying junk to the new system
Handy details
- Portable version: WizTree offers a portable ZIP, so you can run it from your tools drive without installing anything on the client machine.
- Command line: Its search filters can also be used from the command line, which helps if you want to script exports or checks.
- Mac version: The developer also makes a macOS version called WizTreeMac.
Licensing fine print
This is the part to get right. WizTree is free for personal use only. Using it at work requires a paid license for each business site (physical location), and sites with more than 100 staff need an enterprise license.
For MSPs, the license terms allow technicians to install it on client machines when your own site is licensed, but only for your organization’s use. If the client wants to use WizTree themselves, they need their own license.
Deleting files is where the risk is, not scanning. Before you remove anything WizTree finds on a server, confirm what created it and whether an application or backup job still needs it.
Official download: WizTree download page
Related tools
- Advanced IP Scanner: a fast inventory of everything on the network
- Wireshark: seeing what’s actually on the wire
- Fab’s AutoBackup: moving users to a new PC
Sources
- WizTree official site (Antibody Software): reading the Master File Table directly and handling hard-linked files
- WizTree download page (Antibody Software): portable version, command-line filters, and WizTreeMac
- WizTree end-user license agreement (Antibody Software): personal-use terms, per-site and enterprise licensing, and the rules for technicians working on client machines
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