GrandPerspective vs OmniDiskSweeper
Both are free Mac disk analyzers. One draws you a picture. The other hands you a list. Use this comparison to choose between a visual overview and browsing folders by size.
Khaos Studios makes Delve. This comparison draws on the official product documentation linked below.
Choose GrandPerspective for a visual overview, configurable filters, or saved scans. Choose OmniDiskSweeper for browsing files and folders from largest to smallest. Both are available without buying a license.
The paid App Store edition of GrandPerspective is an optional distribution choice. The developer offers the same app free through SourceForge.
| Feature | GrandPerspective | OmniDiskSweeper |
|---|---|---|
| Price | Free direct; $2.99 App Store | Free |
| Primary view | Treemap | Sorted file and folder list |
| Useful for | Comparing groups visually | Following folder names and sizes |
| Additional analysis | Filters, saved scans, image and text export | Focused browsing and file actions |
| Open source | GNU GPL | Not advertised as open source |
| Compatibility | Current version: macOS 14+, Intel and Apple Silicon | Check current download; older versions are linked by macOS |
See the developers’ GrandPerspective feature list and OmniDiskSweeper page for downloads and requirements.
A folder with many medium-sized files can occupy more space than the single large video you remember saving. The treemap makes those groups visible together. GrandPerspective’s filters are useful when you want to focus on a file type or path rather than simply the largest item.
Saved scans also give you a way to reopen a previous view. When comparing results, use the same scan scope and settings so the difference answers the question you intended to ask.
If you know your directory structure, a sorted list can be enough. Follow the largest folder, open the next level, and inspect the file names. OmniDiskSweeper’s current product page describes opening files or moving them to the Trash.
For one familiar folder, Finder may be enough too. See how to find large files on Mac for the built-in options.
Delve combines a treemap and sunburst with Quick Look and a Collector for reviewing selected files before moving them to the Trash. It requires macOS 26 or later and Apple Silicon, with a 14-day free trial. Support our work for $4.99 once or get Delve free through referrals.
Use either free app if it answers your question clearly. Consider Delve when you want to explore the same scan in two visual layouts and gather candidates for one reviewed cleanup action.
For a treemap and configurable analysis, start with GrandPerspective. For a sorted file list, start with OmniDiskSweeper. The better choice depends on how you prefer to inspect folders.
Yes. The official SourceForge download is free. The developer also sells a $2.99 App Store edition.
The current official product page says files can be moved to the Trash. Check the behavior of any older version before removing files.
No. Disk tools help you locate large items. You still need to check what each file is, whether an app uses it, and whether you have a backup before removing it.
Product details checked September 19, 2026. Prices are in USD where shown; storefronts, taxes, and offers may differ. Recommendations reflect the workflows described here, without a comparative performance benchmark.
Continue with Delve vs GrandPerspective, Delve vs OmniDiskSweeper.
Explore your storage with Delve. See the largest files, preview what you find, and choose what belongs in the Trash.