Foldscale app icon

Finder, but every folder
shows its size.

Foldscale is a free, open-source disk space analyzer for macOS. Everything sorted biggest-first at every level — and a Free up space button that knows what's safe to trash.

Download for macOS View on GitHub

Version 1.2.0macOS 14 or laterApple silicon & IntelNotarized by AppleMIT license

$brew install --cask mikehoncho32/foldscale/foldscale
Foldscale showing a home folder: every folder with its size, sorted biggest-first, with a Movies folder expanded Foldscale showing a home folder in dark mode: every folder with its size, sorted biggest-first
Your drive, the way Finder shows it — plus a size bar on every row, relative to its parent folder.

A disk analyzer for people who don't want a nerd tool.

Other analyzers lead with a chart and hide the file list. Foldscale inverts that: the list is the product.

Looks like Finder

No treemap to decode. Folders you already know, with a size next to each one and the biggest on top at every depth. Drill down without losing scale.

Always current

Opens instantly from your last scan and refreshes in the background. The folder you click is re-checked on the spot. No “scanning…” wall.

Free up space

Say how much you need. Foldscale pre-ticks the safest candidates to cover it — old installers, caches, build junk — you adjust, one confirmation.

Task lists, not filters

Safe to removeReview first
Downloads, Caches & Trash, Developer junk, Apps & games, Big projects, Videos & recordings — each with a GB total and a safety badge.

Safe by construction

Everything goes to the Trash — never a permanent delete. System folders refuse to be trashed. Foldscale never opens your files and never downloads cloud placeholders.

Private and open

No network access, no analytics, no account. Signed and notarized by Apple, MIT-licensed, and every line is on GitHub.

“I need 10 GB.”

Pick a target. Foldscale ranks what it found by how safe it is to remove and ticks the safest until the target is covered.

  1. Choose an amount — 5, 10, 20, 50 or 100 GB.
  2. Review the pre-ticked list — nothing marked “review first” is ever ticked for you.
  3. Move to Trash — one confirmation, and it's all still in the Trash if you change your mind.
The Free up space view: a target of 10 GB with the safest candidates pre-ticked The Free up space view in dark mode

Install

Three steps. No account, no launcher, no background agent.

  1. Download Foldscale-1.2.0.dmg and open it.
  2. Drag Foldscale to your Applications folder.
  3. Open it. It's notarized, so it just launches. Grant Full Disk Access when asked to see everything.
Prefer Homebrew? brew install --cask mikehoncho32/foldscale/foldscale — updates arrive with brew upgrade.
The Developer junk list: DerivedData, caches and build folders with sizes and safety badges
Developer junk — DerivedData, simulators, node_modules and friends, with what's safe to rebuild.

Questions

Why does it ask for Full Disk Access?

macOS hides parts of your own home folder (Mail, Messages, Safari data…) from apps unless you allow it. Without it, Foldscale still works — those folders just show as “not readable”.

Can it delete something I need?

It can only move items to the Trash, and it refuses to touch system folders. Nothing is gone until you empty the Trash yourself.

Does it send anything anywhere?

No. Foldscale has no networking code at all. Scans are stored in a local cache in your Application Support folder and nowhere else.

Will it download my iCloud files?

No. Online-only placeholders show their real local footprint with a cloud badge; Foldscale reads metadata only and never opens file contents.

Wasn't this called Radix?

Yes, until 1.2.0. An unrelated Mac disk analyzer already used that name, so we renamed rather than share it. Same app, same code — only the name changed.

Is it really free?

Yes — MIT-licensed, source on GitHub. If it helped you, a star on the repo helps others find it.

What does it need?

macOS 14 (Sonoma) or later on Apple silicon or Intel. A full scan of a 1 TB drive takes well under a minute.