Best Windows 11 Cleaners & Optimizers 2026

We tested 11 cleaners and optimizers and selected the top 7 that safely remove junk, speed up your PC and free up disk space without harming your system.

Top 7 Best Windows Cleaners in 2026

1. CCleaner Free — Most Popular Choice

The most well-known cleaner. Removes temporary files, browser cache, registry junk, and manages startup programs. Very easy to use.

2. BleachBit — Best Open Source Cleaner

Completely free and open-source. Excellent at cleaning deep system junk, logs, and privacy traces. Highly recommended for advanced users.

3. Wise Disk Cleaner — Best Lightweight Option

Fast, clean interface, powerful cleaning with defragmentation tools. Low system impact.

4. Advanced SystemCare Free — Best All-in-One Optimizer

Cleans, optimizes, protects privacy and repairs Windows problems in one place.

5. Windows Built-in Tools (Storage Sense + Disk Cleanup)

Surprisingly effective and safe. No need to install anything extra for basic cleaning.

6. Bulk Crap Uninstaller — Best for Removing Bloatware

Powerful tool to completely uninstall programs and their leftover files.

7. Treesize Free — Best Disk Usage Analyzer

Shows exactly what is taking space on your drives with visual tree map.

Our Recommendations

Important Safety Note

Always be careful with registry cleaners. We recommend using only trusted tools and creating a System Restore Point before deep cleaning.