--- title: "Free disk space analyzers for Mac: GrandPerspective & more" description: "GrandPerspective, OmniDiskSweeper and Disk Inventory X are free ways to see what fills a Mac’s disk. What each does well, where it falls short, paid options." url: https://tidymac.space/guides/free-disk-space-analyzer-mac/ updated: 2026-10-17 --- [Home](/) [Guides](/guides/) Free disk space analyzers for Mac # Free disk space analyzers for Mac: GrandPerspective, OmniDiskSweeper, Disk Inventory X and macOS’s own GrandPerspective, OmniDiskSweeper and Disk Inventory X are free ways to see what fills a Mac’s disk. What each does well, where it falls short, paid options. 6 min readUpdated October 16, 2026By the Tidy Mac team Short answer The best-known free disk analyzers for Mac are GrandPerspective (a treemap of every file), OmniDiskSweeper (a sorted list of folders by size, from The Omni Group) and Disk Inventory X (an older treemap with file-type colours). macOS’s own Storage settings and Finder are free too. DaisyDisk and Tidy Mac are paid, one-time purchases. The steps 1. Try macOS’s own tools first: System Settings › General › Storage, and Finder search sorted by size. 2. For a visual map of every file, use GrandPerspective. 3. For a plain list of the biggest folders, use OmniDiskSweeper. 4. Give the analyzer Full Disk Access so it can see protected folders. 5. Look up anything you don’t recognise before deleting it. ## The free options Tool View Good at Watch out for macOS Storage settings Categories Recommendations, Apps, Documents System Data stays a closed grey bar Finder search List Large files by size and date Folders aren't totalled GrandPerspective Treemap Seeing every file at once Interface is plain; deletes are up to you OmniDiskSweeper Sorted list Drilling into the biggest folders fast No explanations of what folders are Disk Inventory X Treemap + file types Which file kinds use space Older app; check it runs on your macOS GrandPerspective's source download is free; a paid version on the Mac App Store supports its developer. Check each developer's site for the current version and macOS support. ## What none of them tell you A disk map shows that `~/Library/Application Support/Google` is 12 GB. It doesn't tell you whether that's safe to remove, whether it comes back, or which app owns a folder with a bundle-ID name. For that, look up the folder first: [What's this folder?](/folders/) · [Is it safe to delete?](/guides/what-is-safe-to-delete-on-mac/) They also differ in how they count APFS clones and iCloud-only files, so their totals may not match Disk Utility. [Why numbers differ](/guides/finder-disk-utility-free-space-different/) ![](/img/brand/tidy-128.png) ### Let Tidy Mac do this for you See every part of your storage explained, and clear junk to the Trash with Undo. $9.99 once, 2 Macs. [Download](/download/TidyMac.dmg) [Buy for $9.99 once](/buy/) ## Give it Full Disk Access Without it, any analyzer misses Mail, Messages, iPhone backups and some app containers. Open **System Settings › Privacy & Security › Full Disk Access** and add the app. [What Full Disk Access is](/glossary/full-disk-access/) ## The paid options - **DaisyDisk**: a polished interactive sunburst map, one-time purchase. [Compared](/compare/tidymac-vs-daisydisk/) - **Tidy Mac**: a Space Map (treemap and sunburst) plus a plain-English explanation of every part of System Data, junk sorted into Safe to clear, Worth a look and Kept, and cleaning to the Trash with Undo. $9.99 once for 2 Macs. [Pricing](/#pricing) Also compared: [OmniDiskSweeper](/compare/tidymac-vs-omnidisksweeper/) · [macOS Storage settings](/compare/tidymac-vs-macos-storage-settings/) ## Frequently asked questions What is the best free disk space analyzer for Mac? GrandPerspective for a visual treemap, OmniDiskSweeper for a sorted list. macOS’s own Storage settings and Finder search are free and built in. Is OmniDiskSweeper still free? It has long been offered free by The Omni Group. Check omnigroup.com for the current version and macOS support. Why doesn’t my disk analyzer show System Data? Analyzers show folders, not Apple’s categories. System Data is spread across ~/Library, snapshots and hidden folders, and some need Full Disk Access to read. [What System Data is](/learn/what-is-system-data-on-mac/) Is DaisyDisk free? No, DaisyDisk is a paid, one-time purchase. Check daisydiskapp.com for the current price. ## Keep reading [Tidy Mac vs DaisyDisk](/compare/tidymac-vs-daisydisk/)[Tidy Mac vs OmniDiskSweeper](/compare/tidymac-vs-omnidisksweeper/)[Storage manager](/mac-storage-manager/)[How to find large files on your Mac](/guides/find-large-files-mac/)[Screenshots taking up space on your Mac: where they go and how to clean them up](/guides/screenshots-taking-up-space-mac/)[Apple Mail taking up too much space on your Mac: how to shrink it safely](/guides/apple-mail-taking-up-space-mac/) Share:[X](https://x.com/intent/post?text=Free%20disk%20space%20analyzers%20for%20Mac%3A%20GrandPerspective%2C%20OmniDiskSweeper%2C%20Disk%20Inventory%20X%20and%20macOS%E2%80%99s%20own&url=https%3A%2F%2Ftidymac.space%2Fguides%2Ffree-disk-space-analyzer-mac%2F)[Reddit](https://www.reddit.com/submit?url=https%3A%2F%2Ftidymac.space%2Fguides%2Ffree-disk-space-analyzer-mac%2F&title=Free%20disk%20space%20analyzers%20for%20Mac%3A%20GrandPerspective%2C%20OmniDiskSweeper%2C%20Disk%20Inventory%20X%20and%20macOS%E2%80%99s%20own)[Hacker News](https://news.ycombinator.com/submitlink?u=https%3A%2F%2Ftidymac.space%2Fguides%2Ffree-disk-space-analyzer-mac%2F&t=Free%20disk%20space%20analyzers%20for%20Mac%3A%20GrandPerspective%2C%20OmniDiskSweeper%2C%20Disk%20Inventory%20X%20and%20macOS%E2%80%99s%20own)[LinkedIn](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Ftidymac.space%2Fguides%2Ffree-disk-space-analyzer-mac%2F) #### On this page [The free options](#the-free-options)[What none of them tell you](#what-none-of-them-tell-you)[Give it Full Disk Access](#give-it-full-disk-access)[The paid options](#the-paid-options)[FAQ](#faq) **Tidy Mac** See this on your own Mac in under a minute. $9.99 once, 2 Macs. [Download](/download/TidyMac.dmg)