Download wiztree for Windows (Latest Version)

wiztree Official Introduction

If you’ve ever stared at a red full C drive and had zero clue what’s eating up all your space, WizTree from Antibody Software fixes that problem faster than any other tool on Windows. Most disk analyzers take minutes to crawl through a full drive, especially if you have a terabyte or more of files. This one wraps up the same scan in seconds, and it’s not even close — it’s easily the quickest utility of its kind you can run on a desktop.

The speed trick is simple but clever. For NTFS drives, which is what almost every modern Windows PC uses, WizTree reads the Master File Table directly from the disk instead of scanning every file one by one through the operating system. That’s the same trick tools like Everything use for instant file search, and it works just as well for space analysis. A 1TB drive finishes scanning in literally a few seconds, and even larger multi-terabyte drives take way less time than competing tools. It also handles FAT32, exFAT, external USB drives, and network folders just fine — those scan a little slower, but still hold up well against alternatives.

Once the scan finishes, you get two core views side by side, and you can bounce between them depending on what you’re looking for. The left side has a standard folder tree sorted by size, so you can drill down directory by directory to see which folders are hogging the most space. The bottom of the window has a colored treemap block view where every rectangle represents a file or folder, sized proportionally to how much space it takes up. It sounds gimmicky at first, but it’s actually really good for spotting huge single files or big clusters of small files you forgot about at a glance. You can click any block to jump straight to that folder, no digging required.

There are a bunch of small quality-of-life features that add up during real use. You can sort the full file list by size to immediately see the biggest individual files on your drive, which is perfect for hunting down old game installs, forgotten ISO files, or giant video files you don’t need anymore. Built-in search and filter tools let you narrow results by file type, date, or name, so you can quickly tally up all your images, archives, or log files across the whole drive. You can also delete, move, or rename files right from inside the app without opening Explorer separately, and there’s a right-click menu for all the standard file operations. It handles hard links correctly too, so you don’t get inflated fake numbers from files counted multiple times.

Portability is another underrated plus. There’s a standalone portable version you can drop on a USB stick and run without installing anything, which is super handy if you do tech support or need to clean up space on a friend’s PC. You can export full scan results as CSV or HTML files if you want to save a snapshot for later comparison or share it with someone.

The free edition is shockingly fully featured. It’s free for personal use, no ads, no feature locks, no scan limits. You get the full speed, all the view modes, file operations, and export tools without paying a cent. Paid licenses exist for commercial and business use, and they add priority support and a few extra enterprise features, but most regular users will never need them.

It’s not completely without small downsides. The interface is pretty utilitarian and plain looking — it’s not ugly, but it’s definitely built for function over form. The treemap can feel a little cluttered on drives with hundreds of thousands of tiny files, and you can’t do fancy interactive breakdowns like some more expensive tools. None of that is a dealbreaker for what the tool actually does, though.

wiztree Tips

You don’t need a long tutorial to use this tool, but these three tips will get you tangible results on your very first scan.

Start with one-click scanning

There’s no complicated setup or nested menu diving required. Open the app, pick the drive you want to check from the dropdown, and hit Scan. For NTFS drives — the standard format for almost every modern Windows PC — it reads the drive’s Master File Table directly instead of looping through every file one by one. That’s the secret behind its speed. A 1TB drive finishes in literal seconds, and even multi-terabyte drives take a fraction of the time competing tools need. It works with external USB drives, exFAT/FAT32 volumes and network folders too, just at a slightly slower pace.

Pick the right view for your goal

Two core views cover 99% of use cases, and you can switch between them whenever you want. The left-side folder tree sorts every directory by size, so you can drill down layer by layer to track down bloated folders. The colored treemap at the bottom shows every file as a sized block, making it easy to spot huge single files you forgot existed at a glance. For total beginners, sorting the full file list by size is the fastest way to hunt down giant old videos, forgotten game installs or unused ISO files that are wasting the most space.

Clean up files right inside the app

Once you find the files you don’t need, you don’t have to open File Explorer separately to delete them. You can delete, move, rename or open any file or folder straight from the right-click menu. One quick heads up for new users: stick to your personal files and downloads. Leave system folders alone unless you know exactly what you’re deleting, to avoid breaking anything.