SpaceSniffer vs WizTree (2026): which should you pick?

Pick SpaceSniffer if

• Fits if you want to see at a glance which folders are using your disk
• Works for people who prefer a portable program with typed filters

Look elsewhere if

• Skip it if you use a Mac or Linux, as no other platform is named
• Too light for you if you want it to clean up junk, since it only reports
• Watch out: the site lists no system requirements
• Watch out: downloads are linked through a mirror called dAppCDN, not hosted on the vendor's own page

Pick WizTree if

• Fits if your drive is full at home and you want the answer for free
• Works for people on both Windows and a Mac who want the same tool on each

Look elsewhere if

• Skip it if you want a free tool for the office, as commercial use needs a supporter code from $25
• Pricey if you want every new version, because a code covers one year of upgrades and a renewal is 50% off, not free
• Not for you if you need to scan an Android phone from a Mac, since WizTreeMac can't scan MTP devices yet
• Watch out: WizTreeMac needs macOS 12 or later and has no match for the fast Windows scan
• Tight if you're on the free version and need help, as it comes with no support and adds a donation line to exports

SpaceSniffer

• It analyzes and reports; the vendor's pages describe no cleanup or deletion tools beyond the Windows file menu.
• The vendor's pages are short and the site lists no system requirements; the Windows context menu support points to Windows only.
• Downloads are linked through a mirror called dAppCDN rather than hosted on the vendor's own page.

WizTree

• The free version is for personal use only; commercial use needs a supporter code priced by the organization's total staff, per site.
• A supporter code covers versions released within one year of purchase. Newer versions need a new code, offered at 50% off.
• WizTreeMac needs macOS 12 or later, has no equivalent of the Windows MFT scan and cannot yet scan MTP devices such as Android phones.
• The free version shows a Donate button, adds a donation message to exports and comes with no support.

SpaceSniffer

Treemap view

Folders and files appear as blocks sized by how much space they use. One click opens a block for detail and a double click zooms to it.

Filter field

Type criteria such as *.jpg, >2years or a color tag to limit the view; a leading pipe excludes matches. Filters can be combined.

Color tags

Mark files red, yellow, green or blue with keyboard shortcuts to keep track of what was examined, and filter by tag.

Live scanning

You can navigate while the scan runs, and the view updates if the file system changes during a scan.

Export module

Produces text reports of the result, and the layout of the report can be customized.

WizTree

Direct MFT scanning on Windows

On NTFS drives the Windows version reads the Master File Table straight from the disk, which needs administrator rights, and falls back to standard scanning elsewhere.

Visual treemap

Draws every file and folder as a block sized by the space it takes, so large files and large collections of small files can be spotted at a glance.

Largest and duplicate files

File View lists every file and folder in order of size. Duplicates are found by name, size and optionally date, and shown under the file they match.

File search

A search filter in File View finds files by name or type, with wildcard searches such as *.mp3 and regular expressions.

CSV export and import

All or selected file data can be exported to a CSV file or copied to the clipboard, and exported CSV files can be imported again to track changes over time.

Command line

CSV exports and MFT dumps can be run with command-line parameters, which the vendor suggests for automated auditing of drives.

SpaceSniffer

• SpaceSniffer$0

  Freeware for personal and commercial use; donations are optional.

WizTree

• Free Version$0

  Personal use only: scanning, tree view, treemap, file search, CSV export and duplicate finder, with a Donate button and no support.

• Supporter: Individual$25

  one-time purchase, perpetual, 1 year of upgrades

  Allows commercial use, removes the Donate button and the donation message from exports, and adds standard support.

• Supporter: Business (up to 100 staff)$100 to $500

  one-time purchase per site, by total staff

  Micro (up to 5 staff) $100, Small (up to 20) $200, Medium (up to 50) $350, Large (up to 100) $500. Covers all staff devices at one site.

• Enterprise (single site)$750

  one-time purchase, perpetual, 1 year of upgrades

  Unlimited use for organizations with more than 100 staff at a single location, with priority support.

• Enterprise (multi site)$1,800

  one-time purchase, perpetual, 1 year of upgrades

  Unlimited use for organizations with more than 100 staff working from more than one location, with priority support.

SpaceSniffer

No public discounts listed.

WizTree

• Lifetime license

  Perpetual supporter code

  Supporter codes do not expire: a code keeps working on any WizTree version released within one year of the purchase date.

• Other savings

  50% off renewal licenses

  Existing supporter code holders get 50% off the regular license fee when they buy a renewal license, after verifying their email address and code.

• Nonprofit

  Discounts for non-profit organizations

  The purchase page says discounts are available for non-profit organizations such as schools, universities, charities and government agencies.