Windows & macOS  ·  v2.0

Stop wasting space on duplicate files

DuplicateFinder scans any folder — even a 400 GB photo library — and gives you a precise, safe merge plan in minutes. No cloud. No subscriptions. One licence, one machine.

Get DuplicateFinder — $14.99 View Manual
One-time payment
Machine-bound licence
Recycle Bin safe
DuplicateFinder v1.0 — E:\Photo Library
Setup
Scan
Results
Merge Plan
History
11,427
Files scanned
214
Dup groups
4.8 GB
Reclaimable
Stage 4 — Full hash  ·  Complete 100%
IMG_4821.HEIC / photo_backup.heic
3 copies  ·  6.2 MB each  ·  .HEIC
−12.4 MB
Annual Report 2024.pdf / report_final.pdf
2 copies  ·  3.4 MB each  ·  .PDF
−3.4 MB
Holiday_2023.mp4 / backup_holiday.mp4
2 copies  ·  1.8 GB each  ·  .MP4
−1.8 GB
Stage 1  ·  Stage 2  ·  Stage 3  ·  Stage 4
Why DuplicateFinder

Duplicate files are a silent tax on your storage

Every backup, sync, and copy operation creates invisible clutter. DuplicateFinder makes it visible — and safely removable.

The problem with duplicate files

  • Backup drives fill up faster than expected — duplicates are invisible
  • Photo libraries and document folders contain 20–40% redundant copies
  • Manual review of thousands of files takes days, not hours
  • Accidentally deleting the wrong file means permanent data loss
  • Renaming duplicates hides them from simple name-matching tools

How DuplicateFinder solves it

  • 4-stage pipeline compares content, not just names — catches renamed duplicates
  • Multi-threaded scan handles large folders efficiently
  • Smart merge planner consolidates files into the folder with the most content
  • Recycle Bin by default — every deletion goes to the Windows Recycle Bin first
  • Scan history lets you reload, review, and act on previous results anytime
Features

Everything you need, nothing you don't

Built for Windows 10, 11, Windows Server, and macOS. No subscriptions. No cloud uploads. Your files never leave your machine.

Multi-threaded scan engine

Producer-consumer architecture with drive-type-aware thread count. NVMe gets 16 threads; external drives are tuned automatically — always optimal, never wasteful.

4-stage detection pipeline

Hard-link check → size filter → partial hash → full hash. Eliminates 99% of candidates before reading a single full file. Catches renamed and moved duplicates.

Smart merge planner

Automatically picks the winner folder (most files wins). Filter by file type. Preview every action before it happens. Execute with one click.

Scan history & reload

Every scan is persisted with its full results, log, and merge plan. Load a scan from last week and continue where you left off — no need to re-scan.

Recycle Bin safe by default

All deletions go to the Windows Recycle Bin first. Nothing is permanently removed without your explicit opt-in. Dry Run mode lets you preview every action risk-free.

Machine-bound licence

Your licence is tied to your hardware fingerprint. Secure, offline-validated activation with a 30-day activation window from purchase date.

Compatibility

Supported operating systems

DuplicateFinder is a native desktop application built for Windows 10, Windows 11, Windows Server 2019+, and macOS 12 Monterey or later. No additional runtimes required.

Windows 10

  • Home (64-bit)
  • Pro (64-bit)
  • Enterprise (64-bit)
  • Version 1903 or later

Windows 11

  • Home (64-bit)
  • Pro (64-bit)
  • Enterprise (64-bit)
  • All current builds

Windows Server

  • Server 2019 (64-bit)
  • Server 2022 (64-bit)
  • Server 2025 (64-bit)
  • Desktop Experience required

macOS

  • macOS 12 Monterey or later
  • Apple Silicon (M1/M2/M3+)
  • Intel Macs (64-bit)
  • Universal build · separate .dmg
System requirements
CPU: Any 64-bit processor (Intel/AMD) or Apple Silicon
RAM: 2 GB minimum (4 GB+ recommended for large scans)
Disk: 50 MB for installation
Display: 1024 × 768 minimum
Runtime: No additional runtime required — fully self-contained
Storage: Internal and USB-attached drives only — network & mapped drives are not supported
Not supported: Windows 7, 8, 8.1, macOS 11 or earlier, Linux, 32-bit systems, network drives
See it in action

Real screens. Real results.

These are actual screenshots of DuplicateFinder running on Windows 11.

Pricing

Simple, one-time pricing

No subscriptions. No annual fees. Pay once, use forever on your machine.

Single Licence

DuplicateFinder

$ 14 .99  one-time
  • Single machine licence (machine-bound)
  • Windows 10, 11, Server 2019+ & macOS 12+ (64-bit / universal)
  • Unlimited scans & folders
  • All file types: images, video, audio, documents, archives
  • Scan history & merge plan archive
  • Recycle Bin safe deletion by default
  • 3 years of security & bug-fix updates included
  • Email support
Buy Now — $14.99
Have a promo code? Enter it on the next page for a discount.
Important — Please read before using

DuplicateFinder moves deleted files to the Windows Recycle Bin by default, so they can be restored if needed. However, it is your responsibility to carefully review all selections before executing any merge plan.

The application identifies duplicate files based on content hashing. While this is highly accurate, you should always verify that the files marked for deletion are genuinely unwanted duplicates — especially for important documents, photos, and irreplaceable files.

Recommended practice: Use Dry Run mode first to preview all planned deletions. After executing, review the Windows Recycle Bin before emptying it. AzIdea Solutions accepts no liability for data loss resulting from incorrect selections made by the user.

FAQ

Common questions

DuplicateFinder supports Windows 10 (64-bit, v1903+), Windows 11 (64-bit), Windows Server 2019, 2022, and 2025 (with the Desktop Experience), and macOS 12 Monterey or later (universal — Intel and Apple Silicon). The macOS edition is a separate download (.dmg). No additional runtimes are required. 32-bit Windows and Linux are not supported. DuplicateFinder scans internal and USB-attached drives only — network drives and mapped network locations are not supported.

Your licence is tied to the hardware fingerprint of the machine you activate on (CPU ID, motherboard serial, BIOS UUID). Each key works on one machine at a time — to move to new hardware, deactivate the old machine first and reactivate with the same key. For anti-piracy reasons, a licence can be moved between computers at most 5 times; each deactivation counts toward this limit, after which the key stays on its current machine. Need it on several machines at once? Buy one key per machine (you can purchase multiple keys in a single order). If you reach the move limit or replace your hardware, contact support@azideasolutions.com for help at no extra cost.

Yes — DuplicateFinder scans internal drives, external HDDs/SSDs, and USB flash drives. The thread count is automatically adjusted per drive type to maximise throughput without causing seek thrashing. Network drives and mapped network locations are not supported — only drives physically attached to the computer can be scanned.

By default, all deletions go to the Windows Recycle Bin — you can restore any file within the normal Recycle Bin period. Permanent deletion is an opt-in setting that requires an explicit confirmation. The last copy of any file is never deleted, regardless of settings.

Dry Run mode shows exactly what would happen without touching any files — always recommended before your first execution.

Note: It is your responsibility to review the merge plan carefully before executing. Always verify that files marked for deletion are genuinely duplicates you no longer need.

Immediately after your PayPal payment is confirmed, an activation key is generated and emailed to your registered address. Check your inbox and spam folder. The key must be activated within 30 days of purchase.

If you do not receive the email within 5 minutes, contact support@azideasolutions.com.

Your purchase includes 3 years of security and bug-fix updates from the date of purchase, within the version you bought (for example, all 1.x releases). To update, download the latest package from the Downloads page and run the included Setup.exe — it detects your existing installation, backs up your current version, and copies only the new program files, leaving your settings, scan history, cache, and licence untouched. No re-activation required.

After 3 years, your software keeps working, but to continue receiving the latest features, security patches, and bug fixes you'll need to upgrade to the next major version (a separate, discounted upgrade). We keep the most recent releases of each version available on the Downloads page so you can always re-download what you own.