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Icon of Master Cleaner, a cleanup, optimization and security app for Windows

Master Cleaner

An all-in-one maintenance toolkit for Windows 10/11 that cleans, speeds up and protects your PC. Seven AI scanners, a deep cleaner for junk files and caches, RAM and startup tuning, and a multi-engine malware shield — all running 100% on your device, with every action fully reversible. No account, no cloud, free for personal use.

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Master Cleaner is a native Windows 10/11 app that cleans, optimizes and protects your PC from a single toolkit. Its AI Scan runs seven scanners at once — junk, duplicates, large files, empty folders, broken shortcuts, registry and security — and returns a health score with confidence-ranked recommendations. The Deep Cleaner clears system temp files, browser caches (Chrome, Firefox, Discord, VS Code), GPU shader caches and prefetch data in safe or aggressive mode, while the performance tools trim RAM, reset DNS/TCP, manage startup apps and add a Game Mode that suspends background services.

A multi-engine Security Shield combines YARA-X, ClamAV and Windows Defender with VirusTotal hash lookups and fully reversible quarantine, and the system tools cover duplicate and photo detection, disk-usage visualization, secure deletion and SMART drive health. Everything runs 100% on your device — no cloud uploads, no account — every action is reversible with one-click restore, and an append-only audit log exports to CSV or JSON. It's a lightweight native app with no bundled Chromium, available for Windows 10/11 (64-bit) and free for personal use and small teams.

Highlights

  • Seven AI scanners find junk, duplicates, large files and threats at once
  • Deep-cleans temp files, browser and GPU caches — safe or aggressive mode
  • Multi-engine malware shield with VirusTotal checks and reversible quarantine
  • Runs 100% on-device — no account, every action one-click reversible

Frequently asked questions

Is Master Cleaner free?

Yes. Master Cleaner is free for personal use and for small organizations (under 100 people and under $1M in revenue). It runs entirely on your device and needs no account.

Which platforms does it support?

Master Cleaner is a native app for Windows 10 and 11 (64-bit), available as an installer, an MSI package or a portable executable.

Does it send my data to the cloud?

No. All processing happens 100% on your device, with no cloud uploads and no account. Only optional VirusTotal checks send file hashes — never the files themselves — and only when you choose to run them.

Are the cleanup actions reversible?

Yes. Deleted items go to recoverable archives, quarantine can be undone, and one-click restore brings anything back. An append-only audit log records every action and exports to CSV or JSON.