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Head-to-head · Duplicate File Finders

Czkawka vs Fast Duplicate File Finder

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score Czkawka #2 in Duplicate File Finders 8.8/10 Free plan Free plan✓ 4 of 4 features Visit Czkawka
Fast Duplicate File Finder #10 in Duplicate File Finders 7.5/10 Free plan Free plan✓ 4 of 4 features Visit Fast Duplicate

Czkawka leads on 0 checks, Fast Duplicate File Finder 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 scoreCzkawka · 8.8/10
  • Free planboth

Czkawka scores higher on our rubric for duplicate file finders: 8.8 against 7.5 out of 10; our editors rank them #2 and #10.

On platform coverage, Czkawka gives you Cross-platform where Fast Duplicate File Finder offers Windows.

Czkawka is the better fit for technical users wanting free cross-platform software. Fast Duplicate File Finder is the better fit for windows users scanning varied storage.

  • Czkawka fits best

    Technical users wanting free cross-platform software

  • Fast Duplicate File Finder fits best

    Windows users scanning varied storage

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Side by side

Feature Czkawka 8.8/10 Visit ↗ Fast Duplicate File Finder 7.5/10 Visit ↗
At a glance
Editor score 8.8 7.5
Ranking #2 in Duplicate File Finders #10 in Duplicate File Finders
Best for Technical users wanting free cross-platform software Windows users scanning varied storage
Pricing model Free Free plan + paid
Starting price Free plan —
Free plan ✓ ✓
Free trial — —
Deployment Desktop, Mobile Desktop
Platforms Windows, macOS, Linux, Android Windows
Built for Solo, Small business Solo, Small business
Features Czkawka 4/4 · Fast Duplicate File Finder 4/4
File preview ✓ ✓
Automatic selection ✓ ✓
Recycle Bin / Trash ✓ ✓
Folder exclusions ✓ ✓
Specs
Platform coverage Cross-platform Windows
Scan locations User-selected local directories and paths Folders, computers, local drives, diskettes, CD/DVD-ROM, USB flash drives, external hard drives, NAS, network computers and drives
Match methods File name, file size, name and size, or full-content hash Byte-by-byte content comparison; similar files; file size; similar file names; same file size and name
Our review
Pros
  • 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
  • Scans local, external, NAS, and network storage
  • Compares exact and similar files with internal previews
  • Automates selection and supports several cleanup actions
Cons
  • 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
  • Windows-only platform coverage
  • Similar-file scans are limited in the free version
  • Advanced export and command-line tools require Professional
Our verdict

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 →

Fast Duplicate File Finder is Windows software for locating and removing duplicate files across folders, local drives, external storage, NAS devices, and network locations. It suits users who need more than a filename comparison, with…

Read the review →
  1. CzkawkaDuplicate File Finders 8.8Free plan
  2. Fast Duplicate File FinderDuplicate File Finders 7.5Free plan

Strengths and trade-offs

  • 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

  • Fast Duplicate File Finder — where it wins

    • Scans local, external, NAS, and network storage
    • Compares exact and similar files with internal previews
    • Automates selection and supports several cleanup actions

    Where it doesn't

    • Windows-only platform coverage
    • Similar-file scans are limited in the free version
    • Advanced export and command-line tools require Professional

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