Best Free Duplicate File Finders 2026: 6 Options Compared
Best free Duplicate File Finders compared: Czkawka, dupeGuru, rmlint, jdupes and 2 more, with free-plan limits, platforms and prices from official pages checked October 23, 2026.
•3 min read•Browsers & System Utilities
Quick comparison
| Tool | Price | Platforms | Best for | Tested |
|---|---|---|---|---|
| Czkawka | Free (free, open source) | Windows, Linux, macOS, FreeBSD, Android | Most people, on any platform | Docs only |
| dupeGuru | Free (Free and open source) | Linux, macOS, Windows | A cross-platform graphical finder | Docs only |
| rmlint | Free (Free and open source) | Linux, FreeBSD, macOS, Solaris | Fast scripted cleanup on Linux | Docs only |
| jdupes | Free (Free and open source) | Linux, Windows, macOS, BSD | Speed on Windows or Linux from a shell | Docs only |
| AllDup | Free (Freeware, free for private users and companies per alldup.de search snippets) | Windows | Windows users who want many search options | Docs only |
| Auslogics Duplicate File Finder | Free (Free version: search with default settings, review groups, delete copies to the Recycle Bin manually); paid from $29.95 per year, Pro list price for 3 PCs (page showed $25.46 after a 15% coupon) | Windows 7-11 | Simple Windows scans with an upsell path | Docs only |
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Good fit if
- You want one easy tool on Windows, Mac or Linux (Czkawka is the pick)
- You want a second graphical finder to compare results (dupeGuru is the pick)
- You are comfortable with scripts on Linux (rmlint is the pick)
- You want a command-line tool that also runs on Windows (jdupes is the pick)
- You are on Windows and want a classic GUI (AllDup is the pick)
Not ideal if
- You need paid-tier features, uptime guarantees or support that these free plans leave out
A duplicate file finder compares files by size and content, then lets you delete the extra copies, and the best free ones are open source. Czkawka is the friendliest: a graphical app for Windows, Linux and macOS that also finds empty folders and big files. dupeGuru is a Python and Qt graphical finder for the same three systems. rmlint and jdupes are command-line tools built for speed, rmlint aimed mainly at Linux and jdupes with a native Windows port; they suit people who script their cleanup. AllDup is a Windows freeware tool with many search options, and Auslogics Duplicate File Finder has a free tier that deletes to the Recycle Bin but keeps automatic selection for Pro. The trade-off is safety against speed. Automatic selection of which copy to keep is where people lose files: a program cannot know that the copy in an old backup folder is the one you wanted. Always send deletions to the Recycle Bin or compare by content first, scan only the folders you care about, and never point a finder at system folders or an app's data directory, where identical files are often supposed to be identical.
Czkawka
MIT core, free on Windows, Linux, macOS, FreeBSD and Android. Finds duplicates, empty folders, big and temporary files; the GTK GUI has been superseded by Krokiet.
Price: Free (free, open source) (Czkawka pricing, checked 2026-10-22).
Platforms and license: Windows, Linux, macOS, FreeBSD, Android. MIT (core) (open source).
Project activity: 34.6k GitHub stars · latest release 12.0.2 (Sep 9, 2026) · last commit Sep 16, 2026
Best for: Most people, on any platform.
Worth knowing: Finds duplicates, empty folders, big and temporary files; GTK GUI superseded by Krokiet.
dupeGuru
GPL-3.0 Python and Qt app for Linux, macOS and Windows. The README asks for maintenance help, so check the repository for recent activity before depending on it.
Price: Free (Free and open source) (dupeGuru pricing, checked 2026-10-23).
Platforms and license: Linux, macOS, Windows. GPL-3.0 (open source).
Project activity: 7.9k GitHub stars · latest release 4.3.1 (Jul 9, 2022) · last commit Sep 7, 2026
Best for: A cross-platform graphical finder.
rmlint
GPL-3.0 command-line tool for Unix systems; Linux is the main target and some optimisations may be missing elsewhere. No Windows build is stated on the page.
Price: Free (Free and open source) (rmlint pricing, checked 2026-10-23).
Platforms and license: Linux, FreeBSD, macOS, Solaris. GPL-3.0 (open source).
Project activity: 2.4k GitHub stars · latest release v2.10.3 (Mar 22, 2025) · last commit Oct 16, 2026
Best for: Fast scripted cleanup on Linux.
jdupes
MIT-licensed command-line finder derived from fdupes 1.51, with a native Windows port and Linux builds. Fast but text-only, so you read its output before deleting.
Price: Free (Free and open source) (jdupes pricing, checked 2026-10-23).
Platforms and license: Linux, Windows, macOS, BSD. MIT (open source).
Best for: Speed on Windows or Linux from a shell.
AllDup
Windows freeware, free for private users and companies according to alldup.de. Check the vendor site for the current download and feature list.
Price: Free (Freeware, free for private users and companies per alldup.de search snippets) (AllDup pricing, checked 2026-10-23).
Platforms and license: Windows. Proprietary freeware.
Best for: Windows users who want many search options.
Auslogics Duplicate File Finder
Free version for Windows 7-11 reviews groups and deletes to the Recycle Bin by hand; Pro is a $29.95 yearly subscription for 3 PCs. No Mac or Linux version, and no network drives.
Price: Free (Free version: search with default settings, review groups, delete copies to the Recycle Bin manually); paid from $29.95 per year, Pro list price for 3 PCs (page showed $25.46 after a 15% coupon) (Auslogics Duplicate File Finder pricing, checked 2026-10-23).
Platforms and license: Windows 7-11. Proprietary freemium.
Best for: Simple Windows scans with an upsell path.
Which one to pick
- You want one easy tool on Windows, Mac or Linux: Czkawka
- You want a second graphical finder to compare results: dupeGuru
- You are comfortable with scripts on Linux: rmlint
- You want a command-line tool that also runs on Windows: jdupes
- You are on Windows and want a classic GUI: AllDup
Limits of this review
Docs-only for Czkawka, dupeGuru, rmlint, jdupes, AllDup, Auslogics Duplicate File Finder: we did not install or run them, so feature claims come from vendor pages. Vendor prices and free limits change; confirm on the linked pricing page before you commit.
Related guides
Sources
Kevin Fan
Kevin Fan is a SaaS founder. He runs Free Instead Of, which tracks free and open-source alternatives to paid software and checks each price and free-plan limit against the vendor's own pages.
Methodology
Based on official pricing, license and product pages checked between 2026-10-22 and 2026-10-23: Czkawka, dupeGuru, rmlint, jdupes, AllDup, Auslogics Duplicate File Finder. Prices, free limits and licenses are the figures shown on those pages on those dates. No tool on this page was installed or run. No accounts were created.