100% On-Device · Native SwiftUI
Where did all your
disk space go?
Point Diskr at any folder and it maps every file into an interactive sunburst — concentric rings sized by exactly how much space each thing takes. Click a slice to inspect it, double-click to dive in, and move the space hogs to the Trash. Native, offline, and nothing ever leaves your Mac.
v1.0.0 · macOS 14+ · Apple Silicon & Intel · Signed & notarized by Apple · No account
How it works
Point. Scan. Drill. Reclaim.
Point it at a folder
Open Folder… with ⌘O, Scan Home Folder with ⇧⌘H, or just drag a folder onto the window. Diskr starts mapping it immediately.
Watch it scan
A background scan walks the tree with a live item counter, measuring the on-disk space each file actually uses. Cancel any time — nothing is touched.
Read the sunburst
Every file and folder becomes a slice, sized by how much space it takes. Hover for a tooltip, double-click to drill in, and use the breadcrumb to jump back up.
Reclaim the space
Found the hog? Select it and press Trash — Diskr moves it to the Trash after a confirmation, then every parent ring shrinks live. Never a hard delete.
Safe by design
Deletes only when you say so.
A disk cleaner points at your whole drive — so Diskr treats your files with care. Scanning only ever reads, and the one destructive action always goes through the Trash.
Move to Trash, never delete
Removing an item moves it to the Trash — with a confirmation dialog first — so anything you clear out is recoverable straight from Finder. Diskr never hard-deletes and never empties your Trash.
Always recoverable
Scanning only reads
A scan reads file sizes and nothing more — Diskr never opens, modifies, or moves your files on its own. It only acts when you explicitly choose Reveal, Copy Path, or Trash from a menu.
Read-only
The folders macOS needs are off-limits
Your home folder,
Protected paths
~/Library and its app-data folders, the standard user folders and the system directories simply can't be trashed from Diskr — it explains why instead. The confirmation always shows the full path, and Cancel is the default button, so deleting is never one stray Return away.The picture stays honest
Trash a space hog and every parent slice shrinks instantly, so the chart always reflects what's really on disk. No stale numbers, no rescanning just to see the effect of a cleanup.
Live sizes
Everything on your Mac
The whole map is built locally. File names, sizes, and paths are never uploaded, there's no account, and there's no analytics or telemetry. What Diskr sees stays on your machine.
Private
Features
One picture of your whole disk.
The sunburst turns a folder full of files into a single glance. Every slice is real space, every ring is a level deeper — and everything is one click from an answer.
Double-click any slice to make it the new centre. The breadcrumb tracks where you are, the rings redraw around the folder you picked, and one click on the middle takes you back up.
The interactive sunburst
A recursive radial map, up to six rings deep. Each slice's angle is proportional to how much space it takes, so the biggest hogs are impossible to miss — the outer rings are just the contents of the inner ones.
The headline
Colored by branch
Every slice takes its color from its top-level folder, and those colors stay consistent as you drill — so you always know which part of the tree a slice belongs to, however deep you go.
Drill down & breadcrumb
Double-click any slice — or a row in the sidebar — to recenter the whole chart on that folder. Click the center disk to go back up a level, or use the breadcrumb to jump anywhere in one click.
Dive in
Spotlight on hover
Hover a slice and Diskr focuses it — dimming everything else — while a tooltip shows its name, size, and share of the total. The matching sidebar row highlights at the same time.
Name · size · %
Sidebar with proportion bars
Alongside the chart, the current folder's children are listed largest-first, each with a proportion bar and its size and percentage — the sorted list view of everything the rings are showing.
Background, cancellable scan
Scans run off the main thread with a live item counter so the window stays responsive on huge folders. Changed your mind? Cancel instantly — the scan just stops, and nothing was ever modified.
Live counter
On-disk allocated bytes
Diskr measures the space files actually occupy on the volume — allocated bytes, rounded to whole blocks — not just their logical size. That's the number that decides how full your disk really is.
True usage
Right-click anything
A context menu on any slice or row: Open, Reveal in Finder, Copy Path, or Move to Trash. Inspect a suspect file in Finder before you decide to clear it.
Open · Reveal · Trash
Volume capacity bar
A bar shows used versus free space on the whole volume, so a folder's size always has context — you can see at a glance whether the thing you're looking at is a real dent in your drive.
Drag a folder to scan
Drop any folder straight onto the Diskr window and the scan begins — no dialog, no menu. The fastest path from "this folder feels huge" to a map of exactly why.
100% on your Mac
Diskr only ever sees the folders you point it at, and everything happens locally — no account, no cloud, no telemetry, nothing uploaded. Diskr makes no network calls at all.
Privacy
Light and dark, properly
The whole window follows your Mac's appearance — chart, sidebar, tooltips and all — with contrast that stays readable in both. Native SwiftUI, so it feels at home on macOS.
Signed & notarized
Opens with a normal double-click — no "unidentified developer" warning, no Open Anyway, no Terminal. Signed with an Apple Developer ID and notarized by Apple. One universal build for Apple Silicon and Intel.
No warnings
Built for everyone
Keyboard-driven — open with ⌘O, scan home with ⇧⌘H — with VoiceOver labels on the chart and sidebar and WCAG 2.1 AA contrast in both light and dark.
WCAG 2.1 AA
What the sunburst shows
Up to 6 rings
Sized by on-disk bytes
Colored by branch
Hover tooltips
Double-click to drill
Breadcrumb to jump back
Volume capacity bar
Pricing
Free for you. Fair for work.
Personal use is free forever — the full app, unlimited scans, no key, no account, no nag screens. If Diskr earns its keep at your job, a one-time commercial license keeps it supported.
Personal
Free forever
For individuals and personal projects
- The full sunburst — every feature
- Unlimited scans, any folder or volume
- Drill-down, tooltips, move to Trash
- 100% on-device — nothing uploaded
- No account, no nag screens
- Free updates forever
Commercial
$5 / device
One-time payment — no subscription
- Everything in Personal
- Use commercially at work
- One-time payment — no subscription
- Free updates forever
- Supports solo indie development
The personal tier is the full app — buy a commercial license only if you use Diskr commercially. One seat per device, paid once, yours for life. Secure checkout via Stripe; your license key is emailed instantly.
Download & install
Get set up in seconds.
Download the app and drag it into Applications — that's it. No Terminal, no Homebrew, no sign-up.
Version 1.0.0 · Released July 23, 2026 · Free updates forever
macOS 14 Sonoma or later · Apple Silicon or Intel
Everything Diskr needs is built right into the app — native SwiftUI, no third-party dependencies, nothing else to set up. One universal build runs natively on Apple Silicon and Intel.
Opens with a double-click
Diskr is signed with an Apple Developer ID and notarized by Apple, so it opens cleanly the first time — no
Open Anyway trip through System Settings, no Terminal. Open the DMG, drag Diskr into Applications, and launch it.Your files are safe
Scanning only ever reads sizes, removing an item goes to the
Trash after a confirmation — never a hard delete — and everything stays on your Mac. Nothing is uploaded, ever.FAQ
Common questions.
Is Diskr really free?
Personal use is free forever — the full app, unlimited scans, no account, no trial timer, no nag screens. If you use Diskr at work, a one-time $5 commercial license per device keeps it supported.
Can Diskr delete my files?
Only when you explicitly choose Trash — and it moves the item to the Trash, with a confirmation dialog first, never a hard delete. Anything you remove can be restored from the Trash. Scanning itself only reads file sizes; Diskr never modifies or moves anything on its own.
What can I scan?
Any folder you point it at. Use Open Folder… (⌘O), Scan Home Folder (⇧⌘H), or just drag a folder onto the window. The scan runs in the background with a live item counter and can be cancelled at any time.
Why does Diskr ask for Full Disk Access?
So the sizes it reports are the truth. macOS keeps some folders — Mail, Safari, and other apps' containers — behind a privacy gate, and an app without Full Disk Access sees them as empty. Diskr would then quietly under-report exactly the folders you're hunting for. Granting it lets Diskr read those folders' sizes; it never sends anything anywhere, because Diskr makes no network connections at all. You can say no — Diskr asks the first time you scan, will happily scan anyway, and shows a banner where sizes may be incomplete. You can change your mind any time in System Settings ▸ Privacy & Security ▸ Full Disk Access.
Why is a folder's size different from what Finder shows?
Diskr measures on-disk allocated bytes — the space files actually occupy on the volume, rounded up to whole allocation blocks — rather than logical byte counts. That's the number that determines how full your disk really is, so it can differ slightly from a logical size shown elsewhere.
How deep does the sunburst go?
The chart draws up to six concentric rings at once, each slice sized by how much space it takes. To see deeper, double-click a slice to recenter the chart on that folder — then its contents become the new outer rings. The breadcrumb and the center disk take you back up.
Does Diskr upload anything?
No. The whole scan happens on your Mac — file names, sizes, and paths are never uploaded, and there is no account and no telemetry. Diskr never contacts our servers at all — it has no networking in it.
Why does a scan skip some folders?
Diskr is not sandboxed, so macOS prompts the first time a scan reaches a protected location like Desktop, Documents, or Downloads. If you deny access, that folder simply reads as empty rather than failing the whole scan — grant it and rescan to include it.
Will macOS warn me about an unidentified developer?
No. Diskr is signed with an Apple Developer ID and notarized by Apple, so it opens with a normal double-click the first time — no Open Anyway trip through System Settings, no Terminal.
How do I update Diskr?
Re-download the latest Diskr.dmg from this page and drag the new Diskr into your Applications folder, replacing the old one. Nothing is installed, downloaded, or checked for automatically.