What is bitbroom?

BitBroom is a free, open source disk cleaner for Windows built around one core promise: it will not delete anything it cannot be certain is safe to delete. It exists because most Windows drives quietly fill up with junk hiding in places File Explorer never shows you, things like shader caches, crash dumps, leftover update files, and bloated app caches, while most existing cleaner tools are cluttered with ads, tracking, and outdated registry cleaning tricks that do more harm than good. The main cleaning feature covers sixty categories of temporary files, from Windows system caches to browser caches to caches left behind by game launchers and creative software, plus your own custom folders with age limits you control. A separate duplicate finder verifies matches using a proper file hash rather than just file size, and a dev junk mode can find regenerable folders like node_modules next to real coding projects without touching similar folders inside installed applications. A disk analyzer shows a visual breakdown of what is using space, and a space hogs report flags common hidden space wasters with plain explanations of the safe fix for each one. Safety is the project's central design point. A component called PathGuard checks every deletion twice against a list of protected system locations, symbolic links are never followed during scanning or deletion, and files belonging to cloud storage services like OneDrive are never touched to avoid accidentally deleting something only stored in the cloud. Files changed in the last day are skipped automatically, every deletion is written to a log, and a simulation mode lets you preview exactly what would be deleted without deleting anything. BitBroom requires Windows 10 or 11 and the .NET 10 runtime, is available as a portable download or an installer, and includes a command line version for scripting alongside the main graphical app.