A cleaner that shows you what it will delete
BleachBit removes the files that accumulate on a working system: browser caches and cookies, temporary directories, log files, thumbnails, recent-document lists, crash reports and the contents of the recycle bin. It runs on Windows and Linux, and its cleaning rules are ordinary XML definitions that anyone can read, which matters when a tool is about to delete things. The application does not claim to tune the registry or make a computer faster; it deletes files and frees space, and it tells you in advance what it is going to remove.
What the cleaners actually touch
Windows cleaners cover common browsers, Windows Explorer and system logs, temporary folders, package caches, thumbnail and icon caches, and the recycle bin, along with application-specific rules for other supported software. Each item is a separate checkbox, so you can clear a browser cache without touching saved passwords or a download history. A shredder removes individual files by overwriting them before deletion, and a free-space wipe overwrites the unused parts of a disk so that previously deleted data cannot easily be recovered. Running the program as administrator unlocks system-wide items that a normal user account cannot reach, such as files owned by other accounts or system logs.
Preview first, then clean
The workflow that avoids trouble is simple: select the cleaners you care about, press Preview to see exactly which files would be removed and how much space they occupy, then run the cleanup only after reading the list. Repeating the preview after the first run usually shows a much smaller result, which is a good sanity check that the options behave as expected. For repeated maintenance, the command-line interface accepts the same cleaner names, so a cleanup can be scripted or scheduled. Settings include options to preserve cookies for sites you want to stay logged into, and a portable mode that keeps configuration beside the executable.
Options that deserve caution
Deleting browser cookies and site data signs you out everywhere and destroys saved sessions. Wiping free space takes a long time on a large disk and puts wear on solid-state drives for little benefit, since modern drives and filesystems already make casual recovery unlikely. Shredding a file only makes sense on media where overwriting is meaningful, and it cannot reach copies that other software, backups or cloud sync already hold. Cleaning while other applications are running can also fail on locked files, which is a normal outcome rather than an error in the tool. None of these actions is reversible once performed.
When BleachBit is not the answer
If a machine feels slow, deleting caches rarely fixes the cause; storage health, memory pressure and startup programs usually matter more. If you want registry cleaning and bundled tweaking utilities, all-in-one optimisers target a different set of tasks. BleachBit fits people who want a transparent, open-source cleaner they can read, preview and automate, and who accept that freed space is the real benefit rather than a faster computer.
- Best for
- Users who want a preview-first, open-source cleaner to reclaim disk space and clear browser and system caches on Windows or Linux, including scripted cleanups.
- Good to know
- Always run the preview before cleaning. Cookie and session removal logs you out of sites, free-space wiping is slow on SSDs, and none of the deletions can be undone.
BleachBit deletes caches, logs and temporary files, and shows you the list before anything is removed.
How to get started
- Install BleachBit and start it normally the first time, so you can see which cleaners apply to your account.
- Select the categories you care about, such as browser caches and temporary files, and press Preview.
- Read the preview list and the estimated space freed, and untick anything you would rather keep.
- Run the cleanup, then preview again to confirm the items are gone and nothing unexpected remains.
- Restart BleachBit as administrator only when you need to clean system-wide files, and preview again first.
- For recurring maintenance, run the same cleaners from the command line instead of clicking through the interface.
Questions & answers
Will this speed up my computer?
It frees disk space and removes clutter. Real speed problems usually come from storage health, memory pressure or startup programs, so treat cleanup as housekeeping rather than tuning.
Can I recover files after shredding them?
No. Shredding overwrites the file before deleting it, and a free-space wipe overwrites unused areas, so neither action can be undone.
Is the registry cleaned?
No. BleachBit targets files and caches. It deliberately leaves the registry alone rather than presenting risky edits as maintenance.
