Best Free PC Cleaners and Optimizers for Windows in 2026
Aug 18, 2026
A slow PC usually just needs a cleanup. These free tools clear junk and reclaim space safely.
BleachBit
BleachBit is open source and aggressive at freeing disk space without bundled junk.
CCleaner
CCleaner is the familiar one-click cleaner (skip the extras during install).
Wise Disk Cleaner
Wise Disk Cleaner is fast and light with scheduled cleaning.
See what's using space
Pair a cleaner with WizTree or TreeSize Free to find the biggest files. More in Utilities.