See what each app really takes
Applications lists every installed app with its full size: the app bundle plus its containers, group containers, caches, Application Support, preferences, logs and saved state. Sort by size and the heavy ones are obvious. Expand any app to see each part and its path.
Finds leftovers the way a person would
Broom looks through the Library folders where apps keep their data and finds what belongs to each app, even when a folder's name doesn't match the app's, like Application Support/Google/Chrome. Data shared by two copies of the same app isn't listed while either is installed.
Leftovers from apps you already deleted
The Leftovers tab finds data whose app is gone: containers, group containers, preferences, ByHost preferences, cookies and support folders that match no installed app or helper. It's often the easiest space to reclaim.
Apple apps too
Big Apple apps you don't use, like Xcode or Pages, can be removed with their data. Only apps protected by macOS itself are marked Part of macOS and left alone. Background helpers an app installed show up in Add-ons.
Everything goes to the Trash, so an uninstall can be undone. Manual steps are in our guide to uninstalling Mac apps, and there's a dedicated one for uninstalling Xcode.
Questions
Does dragging an app to the Trash uninstall it?
It removes the app, but not its caches, preferences, containers or support files. Those stay in ~/Library until you remove them.
Is Broom an AppCleaner alternative?
Yes, and it adds sizes for every part, leftovers from deleted apps and a disk map. The Broom vs AppCleaner comparison has the details.
Can I uninstall built-in Mac apps?
Apple apps you installed from the App Store, like Xcode or Pages, yes. Apps protected by System Integrity Protection, like Safari, can't be removed.
Will uninstalling remove my documents?
No. Broom removes the app's own data folders, not files you saved in Documents or elsewhere.