Disk Inventory NG app icon: an isometric 3D treemap

Disk Inventory NG

See where your disk space has gone. A fast, native disk usage visualizer for macOS, Windows and Linux, written in Rust — a tribute to Disk Inventory X.

Download Source on GitHub

Free & open source (MIT) · macOS · Windows · Linux · Raspberry Pi

Disk Inventory NG window: folder hierarchy on the left, a colourful cushion treemap in the middle, file kind statistics on the right

Your whole disk, at a glance

Every file is a rectangle. The bigger the file, the bigger the rectangle, and the colour tells you what kind of file it is. Forgotten downloads, caches and virtual machine images stand out straight away.

Cushion treemap

A squarified layout with 3D cushion shading, so nested folders stay readable even with millions of files.

Three linked views

Folder hierarchy, treemap and file kinds. Select a file anywhere and the other views follow.

Fast

Scans folders in parallel on every CPU core: about 1.4 million items in under 7 seconds when the disk is cached.

File kinds

Total size and count for every file type, coloured to match the treemap. Click a type to list its files.

Find and clean up

A searchable list of the largest files, an inspector, Show in Finder or Explorer, Move to Trash, and rescan just the folder you cleaned up instead of the whole disk.

Zoom anywhere

Double-click or press ⌘/Ctrl ↓ to zoom into a folder, and ⌘/Ctrl ↑ to zoom back out. Mounted volumes are listed on launch.

Install

Get the package for your system from GitHub Releases:

  • macOS (Apple Silicon & Intel): open the .dmg and drag the app onto Applications. The first time, right-click it and choose Open.
  • Windows 10/11: unzip and run Disk Inventory NG.exe. If SmartScreen warns, choose More info → Run anyway.
  • Linux on PCs (x86_64) and Raspberry Pi (64-bit arm64 and 32-bit armhf): make the .AppImage executable and run it, or unpack the .tar.gz.
On macOS, allow Full Disk Access in System Settings → Privacy & Security to scan your whole disk. Without it, macOS hides protected folders and they are skipped.

Or build from source:

git clone https://github.com/surak/diskInventory-NG.git
cd diskInventory-NG
cargo run --release
The installer disk image: drag the app onto the Applications folder

Thank you, Tjark

This project would not exist without the original.

Disk Inventory X by Tjark Derlien was, for many years, the tool Mac users reached for when their disk was mysteriously full. Its idea of three synchronized views (folder hierarchy, cushion treemap and file kinds) is the design Disk Inventory NG follows, and our app icon is a homage to its isometric 3D treemap.

Thank you, Tjark, for creating Disk Inventory X, for giving it to the world for free and as open source, and for showing how useful a picture of your disk can be. Disk Inventory NG is our attempt to carry that idea forward, on modern macOS and now on Windows and Linux too.

Disk Inventory X itself built on earlier work, and so do we:

  • KDirStat by Stefan Hundhammer, whose treemap layout Disk Inventory X used, and WinDirStat, which inspired it.
  • Cushion Treemaps by Jarke J. van Wijk and Huub van de Wetering (1999), and Squarified Treemaps by Mark Bruls, Kees Huizing and Jarke J. van Wijk (2000).
  • Treemaps, invented by Ben Shneiderman.

Disk Inventory NG is an independent reimplementation in Rust. It contains no code or artwork from Disk Inventory X and is not affiliated with or endorsed by its author.