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Head-to-head · Duplicate File Finders

AllDup vs Czkawka

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score AllDup #1 in Duplicate File Finders 9.0/10 Free plan Free plan✓ 4 of 4 features Visit AllDup
Czkawka #2 in Duplicate File Finders 8.8/10 Free plan Free plan✓ 4 of 4 features Visit Czkawka

AllDup leads on 0 checks, Czkawka on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreAllDup · 9.0/10
  • Free planboth

AllDup scores higher on our rubric for duplicate file finders: 9.0 against 8.8 out of 10; our editors rank them #1 and #2.

On platform coverage, Czkawka gives you Cross-platform where AllDup offers Windows.

AllDup is the better fit for windows users wanting a fully free finder. Czkawka is the better fit for technical users wanting free cross-platform software.

  • AllDup fits best

    Windows users wanting a fully free finder

  • Czkawka fits best

    Technical users wanting free cross-platform software

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature AllDup 9.0/10 Visit ↗ Czkawka 8.8/10 Visit ↗
At a glance
Editor score 9.0 8.8
Ranking #1 in Duplicate File Finders #2 in Duplicate File Finders
Best for Windows users wanting a fully free finder Technical users wanting free cross-platform software
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Desktop Desktop, Mobile
Platforms Windows Windows, macOS, Linux, Android
Features AllDup 4/4 · Czkawka 4/4
File preview ✓ ✓
Automatic selection ✓ ✓
Recycle Bin / Trash ✓ ✓
Folder exclusions ✓ ✓
Specs
Platform coverage Windows Cross-platform
Scan locations local drives and storage media; network paths and shares; archive files including ZIP, RAR, and 7Z User-selected local directories and paths
Match methods file content; image similarity; sound similarity; filename; file size; modification or creation date; file attributes; hard links; video or sound duration File name, file size, name and size, or full-content hash
Our review
Pros
  • Matches files by content, names, metadata, media similarity, and duration
  • Scans local storage, network paths, and ZIP, RAR, and 7Z archives
  • Previews results and automates selection before sending files to Recycle Bin
  • Free and open source across Windows, macOS, Linux, and Android
  • Multiple hash methods, caching, exclusions, previews, and selection presets
  • CLI support for scripting, dry runs, JSON output, and automated deletion
Cons
  • Available only for Windows
  • Does not include AI features
  • Integrations focus on Windows media and document applications
  • Scan locations are limited to user-selected directories and files
  • Media matching is narrower than its broader file-cleanup toolkit
  • The legacy GTK interface no longer receives new binaries
Our verdict

AllDup is a free Windows utility for locating and managing duplicate files across local drives, storage media, network paths, and supported archive files. It suits Windows users who want broad control without a paid plan, including private…

Read the review →

Czkawka is a free, open-source file-cleanup suite for technical users who want duplicate detection across Windows, macOS, Linux, and Android-related frontends. It identifies duplicates by file name, size, full-file hash, or combined size…

Read the review →
  1. AllDupDuplicate File Finders 9.0Free plan
  2. CzkawkaDuplicate File Finders 8.8Free plan

Strengths and trade-offs

  • AllDup — where it wins

    • Matches files by content, names, metadata, media similarity, and duration
    • Scans local storage, network paths, and ZIP, RAR, and 7Z archives
    • Previews results and automates selection before sending files to Recycle Bin

    Where it doesn't

    • Available only for Windows
    • Does not include AI features
    • Integrations focus on Windows media and document applications

  • Czkawka — where it wins

    • Free and open source across Windows, macOS, Linux, and Android
    • Multiple hash methods, caching, exclusions, previews, and selection presets
    • CLI support for scripting, dry runs, JSON output, and automated deletion

    Where it doesn't

    • Scan locations are limited to user-selected directories and files
    • Media matching is narrower than its broader file-cleanup toolkit
    • The legacy GTK interface no longer receives new binaries
  • AllDup9.0/10 · Free plan

    A fully free Windows duplicate finder with broad matching and cleanup controls.

    Visit AllDupFull verdict →
  • Czkawka8.8/10 · Free plan

    A free, scriptable duplicate finder for technical users across Windows, macOS, Linux, and Android.

    Visit CzkawkaFull verdict →

More comparisons

All duplicate file finders comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update