What is the best free disk space analyzer for Mac?

OmniDiskSweeper (a list by size) and GrandPerspective (a treemap) are free. macOS also has Storage in System Settings. DiskSpace AI's analysis is free too and explains each folder.

How do I see what is taking up space on my Mac?

System Settings → General → Storage gives an overview. For folder-by-folder detail, use a disk analyzer like the ones in this guide.

Is DaisyDisk better than GrandPerspective?

DaisyDisk has a nicer interactive map and costs $9.99 once; GrandPerspective is free. Neither tells you whether a folder is safe to delete.

The best disk space analyzers for Mac in 2026

In short

To see where your space goes, a free tool is enough: GrandPerspective or OmniDiskSweeper. DaisyDisk has the nicest map. CleanMyMac adds a whole maintenance suite. DiskSpace AI is the one that tells you what each folder is and whether you can delete it.

At a glance

App	What it's best at	Price (Oct 2026)
macOS Storage settings	Big documents and quick recommendations, built in	Free
OmniDiskSweeper	A simple list of folders by size	Free
GrandPerspective	A treemap of every file	Free (paid version in the App Store)
DaisyDisk	A fast, beautiful interactive map	$9.99 once
CleanMyMac	All-in-one maintenance, with a space map	Subscription, or a higher one-time price
DiskSpace AI	What each folder is and whether it's safe to delete	Analysis free; €14.99 once to clean (free in the beta)

Free: OmniDiskSweeper and GrandPerspective

Both show where the space is and nothing more. OmniDiskSweeper is a plain list sorted by size; GrandPerspective draws every file as a rectangle. Good enough if you know what you're looking at.

Paid map: DaisyDisk

The most pleasant way to explore your disk, and a one-time price. Like the free ones, it doesn't tell you what a folder is or whether it's safe to delete.

Suite: CleanMyMac

Cleanup, malware, performance and an uninstaller in one app. Worth it if you want all of that; more than you need if your problem is just space.

Explained: DiskSpace AI

Maps the disk by safety color, explains 60+ kinds of folders (Xcode, Docker, npm, uv, AI models, simulators…), pre-selects only what recreates itself and keeps your own files 7 days with Undo. Built for the question the others leave to you: can I delete this? It's our app, so weigh this paragraph accordingly.

DiskSpace AI does this for you

It analyzes your Mac in minutes, tells you what each folder is and only selects what recreates itself. Your files are kept 7 days in case you change your mind. Free during the beta.

Download the Beta

Folders in this guide

Xcode build data~/Library/Developer/Xcode/DerivedDataRecreates itself
Docker virtual disk~/Library/Containers/com.docker.docker/Data/vms/0/data/Docker.rawReview
iPhone backups~/Library/Application Support/MobileSync/BackupReview
Installers in Downloads~/Downloads/*.dmg, *.pkg, *.zip, *.iso, *.xipReview