Safe Disk Cleanup for Windows
Find duplicate files, discover large files, review risk scores, and reclaim disk space — all without losing anything you didn't choose to delete.
OS Cleaner never deletes anything automatically. Every cleanup action requires your explicit confirmation. You stay in control at all times.
Windows 10 / 11 · ~15 MB · No installation of dependencies
What OS Cleaner Does
Duplicate File Detection
Finds identical files across your drives using content comparison — not just file names. Groups duplicates for easy review.
Large File Discovery
Surfaces the biggest space consumers on your system so you can decide what's worth keeping and what's not.
Risk Score Badges
Each file gets a colour-coded risk indicator, so you know at a glance what’s safe to delete and what to leave alone.
Safe Deletion Flow
Files go to the Recycle Bin by default. Permanent deletion requires an explicit double confirmation from you.
Developer Folder Awareness
Recognises common developer and project directories (node_modules, .git, build output) and flags them appropriately.
Scan History
Keeps a log of previous scans so you can review what was found and actioned without rescanning from scratch.
How It Works
- 01DownloadDownload the installer or portable version. No account, no registration, no personal data collected.
- 02ScanSelect the drives or folders to scan. OS Cleaner analyses your files and presents a clear, categorised report.
- 03Review & CleanReview duplicates, large files, and risk scores. Choose what to remove, then confirm. Nothing is deleted without your say-so.
- 04DoneYour drive is cleaner. Check the scan history anytime to review what was actioned.
Built to Protect Your Files
Many disk cleanup tools delete aggressively. OS Cleaner is designed around the opposite principle — maximum information, minimum risk, full user control.
- No automatic deletion under any circumstances
- Recycle Bin deletion is the default — files are recoverable
- Permanent deletion requires two explicit confirmations
- System files and protected directories are flagged, not silently skipped
- Scan history for accountability and review
- Developer folders detected and handled with appropriate caution
Our Safety Promise
OS Cleaner will never delete a file without your explicit confirmation. You can run a full scan, review every finding, and close the application — and nothing on your drive will have changed.
System Requirements
| Operating System | Windows 10 or Windows 11 (64-bit) |
|---|---|
| Processor | Any modern x64 processor |
| RAM | 2 GB minimum (4 GB recommended for large scans) |
| Disk Space | ~15 MB for the application |
| Permissions | Standard user account sufficient; Admin recommended for full disk access |
| Dependencies | None — standalone application |
Download — Free, Always
OS Cleaner is free. No ads, no premium tier, no registration. A practical product from NSArrows.
⚠ Windows SmartScreen Notice
OS Cleaner is not yet code-signed, which means Windows SmartScreen may show a warning when you run it. This is a standard Microsoft prompt for any unsigned application — not an indication of a threat.
To proceed: click "More info" on the SmartScreen dialog, then click "Run anyway". The application is safe — it does not modify the registry, install background services, or connect to the internet.
Who Should Use OS Cleaner
Developers
Clean up build artefacts, redundant node_modules, old project backups, and stale binaries — without accidentally nuking something important.
Business Users
Maintain a clean, fast Windows machine without needing to understand which system files to avoid. OS Cleaner handles the complexity.
IT Administrators
Run quick disk audits on company machines to surface storage issues before they become problems.
Version 2.0.0 Release Notes
Initial public release — September 2026
- Duplicate file detection across selected drives and folders
- Large file discovery with sortable file list
- Risk score badge system (Safe / Caution / Review)
- Recycle Bin deletion as default action
- Permanent delete with two-step confirmation
- Scan history log
- Developer-aware folder detection (node_modules, .git, build/dist)
- System file awareness — protected files are flagged, not silently excluded
This is the first public release. Additional features, UI improvements, and performance enhancements are planned for future versions. Feedback is welcome via the contact page.
Frequently Asked Questions
Is OS Cleaner really free?
Yes — completely free. No premium version, no in-app purchases, no account required. Download and use it.
Is it safe to use?
Yes. OS Cleaner does not delete anything automatically. Every deletion action requires your explicit confirmation. Files go to the Recycle Bin by default, so they can be recovered if needed.
Why does Windows SmartScreen show a warning?
OS Cleaner is not yet code-signed with a commercial certificate. Windows SmartScreen flags all unsigned applications by default — this is a Microsoft policy, not an indicator that the software is harmful. Click "More info" then "Run anyway" to proceed.
Does OS Cleaner connect to the internet?
No. OS Cleaner is a standalone application with no internet connectivity. It does not send any data externally.
Will it work on Windows 7 or 8?
OS Cleaner is built for Windows 10 and Windows 11 (64-bit). Earlier versions of Windows are not officially supported.
What happens if I accidentally delete something?
By default, OS Cleaner sends files to the Recycle Bin — not permanent deletion. You can restore them from the Recycle Bin as you normally would. Permanent deletion requires an additional confirmation step.
Is OS Cleaner related to NSArrows' other services?
OS Cleaner is a free product from NSArrows Innovations — a demonstration of practical AI-assisted software development. It is independent of NSArrows’ training and consulting services, though it reflects the same philosophy: practical tools built for real use.
Download OS Cleaner — Free
A practical product from NSArrows. Safe, free, and built to actually help.
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