Software · Maintenance & cleanup

Detwinner

Find and remove duplicate files and similar images.

Completely free
Linux
Open source

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by Flathub
License: GPL-3.0+ — Open source (copyleft)confirmed by Flathub
Open source: Yes
Commercial use: Yesconfirmed by Flathub, Official plan pages (pricing, licence, terms)
Account required: not documented
Credit card required: Noconfirmed by Flathub
Watermark: Not applicable
Ads: not documented
Platforms: LinuxEstablished by Linux: Flathub
Publisher: Neat Decisions
Latest version: 0.4.2 (16 April 2022)
Latest activity: 5 November 2026
Source code: github.com/neatdecisions/detwinner

At a glance

All of Detwinner is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

Open source code
Commercial use allowed

About

Detwinner is a tool to search and remove exact file duplicates and similar images. You can search for either exact duplicates (100% byte-to-byte match is ensured by the special hash function) or similar images (Detwinner generates groups of images that look alike using similarity level specified by you). You can also narrow your search by specifying file size, attributes and regular expressions. Smart selection tools provide numerous options for batch selection of files which should be deleted. Instant preview allows you to be confident in your choice. Files can be deleted permanently, to the trash bin or moved to the backup folder.

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) — 10 November 2026
Facts collected from Official plan pages (pricing, licence, terms) (commercial use) — 7 November 2026
Facts collected from LicitPro automatic classification () — 6 November 2026
Last technical check: 6 November 2026
Description from Flathub — AppStream (Flathub)

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