Live sunburst chart
The scanned folder sits at the center and each ring is one level deeper, with arc angles proportional to size. The chart updates while the scan is still running.
Open source · macOS 14+ · Universal binary · Files & Conversion
See what eats
your disk space.
Scan a folder or drive and explore it as an interactive sunburst chart, then reveal or trash what you don't need. Drop a folder on the window or press ⌘O to start.
Free & MIT licensed · Apple Silicon & Intel · Latest release
Features
Scan, see, drill down, clean up.
DiskSunburst covers the core loop of disk cleanup and nothing else, in a native SwiftUI app.
Hover and drill down
Hover an arc to see its name, size and share of its parent. Click a folder to make it the new center, and press Esc or use the breadcrumb to go back.
Largest-items list
A sorted list beside the chart shows the biggest children with size bars. Double-click a folder to drill into it.
Reveal, open or trash
Reveal in Finder, open, copy the path, or move an item to the Trash after a confirmation. Trashed items stay recoverable, and the scan root can't be trashed.
Careful, background scanning
Sums on-disk allocated sizes off the main thread. Symbolic links are skipped and hard links are counted once, so totals aren't inflated.
Simple settings
Show hidden files, treat app bundles as single items, and set the maximum ring depth from 2 to 8. Items under 1% merge into a gray Smaller items arc.
Screenshots
See it in action.
Install
Up and running in a minute.
DiskSunburst is open source and not notarized with a paid Apple Developer ID, so macOS needs one extra step the first time.
- Download DiskSunburst-macOS.zip and unzip it.
- Move DiskSunburst.app to your Applications folder.
- Clear the quarantine flag once, then right-click the app and choose Open:
xattr -cr /Applications/DiskSunburst.app
- Optionally grant Full Disk Access in System Settings Privacy Security Full Disk Access to scan protected locations or a whole disk.
Download
Get DiskSunburst for macOS
Free, forever. Built for macOS 14 Sonoma or newer, Apple Silicon and Intel.
Not notarized: on first launch right-click DiskSunburst.app → Open.
- macOS 14 Sonoma+
- Universal (Apple Silicon + Intel)
- MIT licensed · open source
- No ads, no accounts, no telemetry
- Built with Claude Code · how and why
FAQ
Questions, answered.
Is DiskSunburst really free and open source?
Yes. It is released under the MIT license and the full source is on GitHub. There are no accounts, no ads and no paid tier. If it saves you space, there is an optional Support button.
What permissions does it need?
None beyond the standard macOS file-access prompts, which appear the first time a scan reads Desktop, Documents, Downloads or removable volumes. Full Disk Access is optional and only needed for protected locations. Without it, unreadable folders are counted and reported, and the scan continues.
Where is my data stored?
Nothing leaves your Mac. DiskSunburst makes no network calls and has no analytics, and scan results live in memory only while the app is open. Only your settings are saved locally, as standard macOS preferences.
Why isn't the app notarized?
Notarization requires a paid Apple Developer account, which this free project doesn't have. Right-click the app and choose Open once to get past Gatekeeper, or build it yourself from source with Xcode and XcodeGen.
Was this written by AI?
Yes. DiskSunburst was generated by Claude Code from a written spec as a clean-room reimplementation, with no code or assets from any commercial app. The full source is on GitHub under MIT, so you can read every line before you run it. It has had less human review than a hand-written app, so bug reports are welcome.
Support ❤️
Built by one person, given away for free.
DiskSunburst is a free, open-source alternative to paid utilities. If it earns a spot on your Mac, a coffee keeps the updates coming.
☕ Support Or on Ko-fi