Your PC has slowed down, the disk is filling with junk and browser leftovers, and you want a free tool to clean it out without breaking anything. Two names dominate that search: BleachBit and CCleaner. Both free up disk space, scrub privacy traces, and keep a machine tidy, but they take very different routes. One is open-source, privacy-first, and completely free. The other is polished, beginner-friendly, and carries a complicated history.
We ran both on the same Windows 11 machines and compared how they handle junk files, secure shredding, registry cleaning, and everyday use.
What Is BleachBit?
BleachBit is a free, open-source cleaner built to wipe out junk and protect your privacy. It runs under the GPLv3 licence with no ads, upsells, or bundled software, and you can download it from BleachBit's official site. The current stable release is version 6.0.0, and a legacy build, version 4.7.0, still supports Windows XP, Vista, 7, and 8.
The download is tiny, around 11 MB, and a portable version runs without installing. It clears temporary files, caches, logs, browsing history, cookies, and saved passwords, and can securely shred files. In our testing, the interface felt plain and dated next to CCleaner, and you pre-select every category before a scan.
What Is CCleaner?
CCleaner, made by Piriform, is the best-known name in PC cleaning, and its one-click approach is what most beginners picture. It runs on Windows, macOS, Android, and iOS, and packs in far more than BleachBit, including a registry cleaner, a Drive Wiper, and scheduled cleaning.
In our testing, a one-click scan on a cluttered Windows 11 laptop finished in under a minute and flagged several gigabytes of browser cache and temp files. The catch is setup: the installer bundles extra software you must decline by hand, and Microsoft flags some CCleaner bundles as a Potentially Unwanted Application. It also collects usage data by default.
BleachBit vs CCleaner at a Glance
Here is how the two cleaners compare before we dig in.
| Comparison9 key features |
Our pick
BleachBit
Free
|
CCleaner
Freemium
|
|---|---|---|
| Pricing & platforms | ||
| Price & licensing | Free, open source (GPLv3) | Freemium: Free or Pro $44.95/yr |
| Platforms | Windows, Linux, experimental macOS | Windows, macOS, Android, iOS |
| Open source | ✓Yes | ✗No |
| Cleaning & privacy | ||
| Junk & temp-file cleaning | ✓Yes | ✓Yes |
| Registry cleaning | ✗No | ✓Yes |
| Secure file shredding | ✓Yes | ✓Yes |
| Usability & extras | ||
| Automation & scheduling | Scripting / CLI only | Scheduled (Pro) |
| Ease of use / UI | Plain, dated | Polished, beginner-friendly |
| Bundled extras / telemetry | None | Bundled offers; telemetry on by default |
| Visit BleachBit → | Visit CCleaner | |
We cleaned real clutter with both tools on Windows 11, ran repeat passes to see what each left behind, and tested each one's secure-deletion feature. Every judgement here is from that hands-on use.
Feature-by-Feature Comparison
Here is how they compare where it counts.
Junk & Temporary File Cleaning
CCleaner runs a single one-click scan that flagged several gigabytes on our test laptop in under a minute. BleachBit is more deliberate: you tick the categories you want, then scan. Its app detection can be spotty, though; it missed an installed copy of Chrome on one machine.
Privacy & Secure File Shredding
This is where BleachBit pulls ahead. Its secure shredding is the standout: files deleted this way are effectively impossible to recover, and it can also wipe free disk space. That lines up with NIST's media-sanitization guidance (SP 800-88) on overwriting data you want destroyed. CCleaner has a comparable Drive Wiper but collects telemetry by default.
Registry Cleaning (and why it barely matters now)
CCleaner includes a dedicated Windows registry cleaner in both tiers. BleachBit does not clean the registry at all, by design. Registry cleaning rarely produces a measurable speed gain on a modern PC, so it is not the deciding factor many people assume.
Microsoft does not support registry-cleaning utilities and warns that editing the registry incorrectly can cause serious problems, up to needing a full reinstall. Read Microsoft's support policy on registry-cleaning utilities first.
Automation & Scheduling
CCleaner wins for hands-off cleaning, with scheduled and automatic cleaning plus real-time monitoring on Pro. BleachBit has no graphical scheduler and relies on command-line scripting, better suited to technical users. It also cannot stop a run once it starts.
Interface & Ease of Use
CCleaner is built for beginners: tabs run down the left side, results report plainly, and nothing is buried more than two clicks deep. The main annoyance is constant prompts to upgrade to Professional. BleachBit is more utilitarian, and its time estimates can be wildly off. During one free-space wipe on a 500 GB drive, the estimate jumped from 60 minutes to over 2,300.
Platform & Compatibility (Windows, macOS, Linux)
BleachBit runs on Windows 10 and 11 and is popular on Linux, with .deb and .rpm packages and experimental macOS support. Older Windows uses the legacy 4.7.0 build. CCleaner covers Windows, macOS, Android, and iOS, but has no Linux version.
Pricing: Free vs Paid
BleachBit is free forever under its open-source licence.
CCleaner uses a freemium model. The Free edition costs $0 for one device. Professional lists at $44.95 per year for one device, though CCleaner discounts it often, so you usually pay less. Professional Plus is $64.95 per year for three devices, and the Premium Bundle is $64.95 for up to five, adding Recuva Pro, Speccy Pro, and Kamo. All paid plans carry a 30-day money-back guarantee.
Pros and Cons
BleachBit: Pros and Cons
Pros
- Free and open source, with no ads or bundled software
- Secure shredding makes deleted files effectively unrecoverable
- Runs on Windows and Linux, plus a legacy build for old PCs
- Portable and lightweight, at around 11 MB
Cons
- Plain, dated interface that feels complicated at first
- No one-click mode; you pre-select every category
- No registry cleaner and no built-in scheduler
- Unreliable time estimates and no way to stop a run
CCleaner: Pros and Cons
Pros
- Polished, beginner-friendly layout with a fast one-click scan
- Registry cleaner, Drive Wiper, and scheduled cleaning on Pro
- Broad support across Windows, macOS, Android, and iOS
- Extra tools like Health Check and a Performance Optimizer
Cons
- Free installer bundles extra software you must decline
- Telemetry is on by default and must be turned off
- Carries a 2017 supply-chain breach in its history
- Constant prompts to upgrade to Professional
Which One Should You Choose?
Choose BleachBit If...
You want a completely free, open-source tool with no ads, bundled offers, or telemetry. It is the better pick for privacy, secure shredding, and Linux, and for anyone who wants full control over what gets deleted.
Choose CCleaner If...
You want the easiest experience: a polished one-click scan, a registry cleaner, scheduling, and support across phones and tablets. Just be ready to decline the bundled extras, download only from the official source, and turn telemetry off.
