CCleaner Alternatives: 10 Options Compared, Including Free (2026)

What is PrivaZer?

PrivaZer is a Windows cleaner built around privacy rather than free space. It removes usage traces from the registry, browsers, applications, USB history and the pagefile, and overwrites free space so deleted data cannot be recovered. It is SSD-aware, adjusting its overwrite behavior to avoid ...

What is System Mechanic?

System Mechanic from iolo cleans junk files, repairs registry issues, defragments drives, manages startup programs and applies performance settings, with an automated maintenance mode that runs when the machine is idle. It has been in the market for over two decades and targets non-technical ...

What is Wise Disk Cleaner?

Wise Disk Cleaner removes Windows temporary files, browser caches, log files and system junk, with a slim mode that strips out unneeded Windows components. It includes a disk defragmenter, which is relevant on mechanical drives and unnecessary on SSDs. It is free for the core cleaning function, ...

What is Ashampoo WinOptimizer?

Ashampoo WinOptimizer bundles disk cleaning, registry optimization, privacy sweeping, defragmentation, startup management and a set of Windows tweaking tools. It is more granular than most competing suites — settings are exposed rather than hidden behind a single button — which suits users who ...

What is Avast Cleanup?

Avast Cleanup removes junk files, browser data and unused applications, and includes automatic maintenance plus a sleep mode that suspends resource-heavy background programs. It runs on Windows, macOS and Android, with the Android version focused on photo and cache cleanup where storage limits ...

What is TreeSize?

TreeSize from JAM Software analyzes where disk space has gone, showing folder sizes in a tree view with drill-down, and scanning local drives, network shares and cloud storage. The Professional edition adds duplicate file search, file age and type analysis, scheduled scans and exportable ...

What is WinDirStat?

WinDirStat is a free, open source disk usage analyzer for Windows. Its signature is the treemap view: every file becomes a colored rectangle sized by how much space it takes, so a single enormous forgotten file is visible instantly in a way a folder list never makes obvious. It shows a ...

What is Auslogics BoostSpeed?

Auslogics BoostSpeed combines junk file cleaning, registry repair, disk defragmentation, internet connection tuning and startup management in one Windows maintenance package. Auslogics' disk defragmenter is the component with the strongest independent reputation and is also available separately ...

What is DaisyDisk?

DaisyDisk scans a Mac's drive and presents usage as an interactive sunburst chart, where each segment is a folder or file sized by disk consumption and clicking drills inward. Files are removed by dragging them to a collection area and deleting in one action, which prevents the accidental ...

What is SpaceSniffer?

SpaceSniffer is a free, portable Windows disk usage analyzer using a treemap layout. It requires no installation, which makes it useful on machines where installing software is restricted or inadvisable, and it starts drawing results while the scan is still running rather than making you wait. ...