# GrandPerspective

A free, open-source disk-usage visualizer using tree maps — 20+ years running from a single developer — also on the Mac App Store for $2.99.

- **Category:** [Utilities](https://notchlist.vercel.app/category/utilities/)
- **Price:** Free (or $2.99 via Mac App Store — same app)
- **Open source:** yes
- **Official site:** https://grandperspectiv.sourceforge.net/
- **Available via:** Homebrew, Direct, Mac App Store
- **Requirements:** The current release (3.8.0) needs macOS 14 or later, Apple Silicon or Intel; older releases are maintained for macOS versions back to 10.5.
- **Maker:** Erwin Bonsma

## Kitsmith's take

Scans a disk and draws every file as a rectangle sized to match its footprint, grouped by folder, so oversized files and forgotten folders are visually obvious rather than buried in a Finder list. Built and still actively maintained by a single developer, Erwin Bonsma, since 2005 (its first release turned 20 years old in September 2025) — free and open source (GPL) via SourceForge, or $2.99 via the Mac App Store, explicitly the same app either way, with the App Store fee going toward covering Apple’s developer program cost. Extensively covered over two decades by outlets from Ars Technica and Lifehacker to TidBITS and 9to5Mac.

## Features

- **Tree-map visualization:** Every file drawn as a rectangle sized to its disk footprint, grouped by folder.
- **Deep filtering:** Filter or mask files by name, path, size, type, or hard-link/package status; save filters for reuse.
- **Time Machine and cloud-aware:** Understands hard-linked Time Machine backups and remote cloud files.

## FAQ

**Is GrandPerspective free?**

Yes, free and open source via SourceForge. A $2.99 Mac App Store copy is the same app — the fee covers Apple developer-program costs, per the developer.

**Who makes GrandPerspective?**

Erwin Bonsma, an independent developer, who has maintained it since 2005.

**Is GrandPerspective still updated?**

Yes — actively maintained, with a release (3.8.0) as recently as August 2026, per its own changelog.


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Hand-verified listing on Kitsmith: https://notchlist.vercel.app/apps/grandperspective/