WizTree

ApplicationAntibody Software

Also called wiz tree, diskanalyzer wiztree

Antibody SoftwareSystem

A fast NTFS disk map that reads the master file table. The 64-bit process is WizTree64.exe. It is not TreeSize.

What you need to know

WizTree reads the NTFS MFT. TreeSize is JAM's paid scanner.

Antibody Software WizTree maps disk use by reading the NTFS master file table. Get it from diskanalyzer.com. It is not TreeSize and it is not the slower classic WinDirStat walk.

What is it?: A fast NTFS disk map
Same as TreeSize?: No. Different vendor and method
Why is it fast?: It reads the NTFS MFT

Feex says

If the disk is NTFS and you want the map now, I would open WizTree before I wait on a full WinDirStat walk. I would still not call it TreeSize.

What is WizTree?

WizTree is a disk-space treemap that reads the NTFS MFT. WizTree64.exe is the usual Windows build. TreeSize is JAM's product. WinDirStat walks folders the classic way.

If you have never used it

If a drive is full and you want a fast map on NTFS, WizTree is Antibody Software's MFT reader. Download it from diskanalyzer.com. It draws a treemap after reading the master file table, which is why it feels quicker than a folder walk. It is not TreeSize, not WinDirStat, and not Everything.

What is it used for?

Find the huge files fast on NTFS

The MFT read is why the first map appears quickly. TreeSize and WinDirStat usually walk directories instead.

Treemap and file list

Click a block to see the folder. That visual is closer to WinDirStat than to TreeSize's paid report windows.

Personal versus business license

Antibody documents a free personal license and a paid business license. JAM's SKUs are a different shop.

Who is it for?

People whose C: filled up this afternoon
Home users who want a free NTFS map
Shops that must buy the business license Antibody documents

Current status

WizTree (2016) is a current disk space analyzer from Antibody Software. The vendor still points Windows users at https://www.diskanalyzer.com/download.

How old is it?

WizTree launched in 2016. It is new next to TreeSize (1996) and WinDirStat (2003). The speed story is the NTFS MFT, not a 1990s JAM license.

Versions

Major channels first. Exact build numbers are not all verified here.

Installer

Portable

System requirements

Values follow the publisher's public guidance. Workload still changes the real need.

Minimum

Minimum system requirements
Operating system	Windows 10 or Windows 11, per Antibody Software's current download
RAM	Enough for Windows plus this app. Heavy projects want more.

Resource profile

CPU demand: A short spike while the MFT is read
RAM demand: Follows how many files the volume has

Installed processes

These executables belong to this product when it is installed.

Installed processes
WizTree64.exe	64-bit disk map
WizTree.exe	32-bit build name on some downloads

Startup components

WizTree should not start with Windows. A Startup shortcut is something you added.

File locations

Common WizTree locations
Typical install	C:\Program Files\WizTree\

File formats

It reads the file system. Exports vary by version

Common problems

People expect MFT speed on a network share

The MFT shortcut is local NTFS. A UNC path falls back to a slower walk, like other scanners.

Business use on the free build

Read Antibody's license. TreeSize Professional is a different paid product if you needed JAM support.

Getting unstuck

Download from diskanalyzer.com

A "WizTree Pro key" page is not Antibody. TreeSize lives at jam-software.com if that is what you meant.

Run as administrator if the MFT read is denied

Reading the master file table needs permission. That is WizTree, not a TreeSize license screen.

Use WinDirStat if you wanted the classic slow treemap on a non-NTFS volume

WizTree's fast path is NTFS. Other file systems do not get the same MFT trick.

Alternatives

TreeSize for JAM reports. WinDirStat for a classic free walk. Everything finds names, not folder sizes.

Official help and downloads

Start with the vendor. Random exe sites are not a support channel.

Official contacts
Download	www.diskanalyzer.com/download Official installer or vendor page
Help	www.diskanalyzer.com/faq Vendor support
Official site	www.diskanalyzer.com/ Start here, not a random exe host

Related hardware

Local NTFS on a fast disk makes the MFT read feel instant. The tool does not need a discrete GPU.

Technical details

Vendor version numbers change. This article does not pin a build.

Sources and verification

Reviewed by Feex editorial. Last verified August 2026 Status: Feex Reviewed. How we research.

WizTree official site · Vendor product page
WizTree help · Vendor support
WizTree · What Antibody Software ships
Foxhole process map · First-party samples on Windows PCs. Not a lab benchmark.

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