Productivity

12 Open-source Free Duplicate File Finder and Duplicate Removal Apps

Hazem Abbas

Jan 16, 2024 — 8 min read

Photo by Adam Birkett / Unsplash

A duplicate finder and removal app is absolutely necessary for multiple reasons. Firstly, duplicate files consume valuable storage space on your device. By identifying and eliminating duplicates, you can liberate storage and optimize your device's performance.

Moreover, duplicate files can lead to confusion and hinder the ability to find the original version of a file. A duplicate finder and removal app assists in organizing your files and streamlining your workflow. Lastly, eliminating duplicates can bolster data security by reducing the risk of inadvertently working with outdated or incorrect files.

In this article, you will find a list of the best free and open-source duplicate finder apps.

1- dupeGuru

dupeGuru is a cross-platform GUI tool designed to help you find and manage duplicate files on your computer. It supports Linux, OS X, and Windows operating systems.

Written primarily in Python 3, dupeGuru utilizes multiple GUI toolkits, all built on the same core Python code. On OS X, it employs Objective-C and Cocoa for the UI layer, while on Linux and Windows, it utilizes Python and Qt5.

Key Features

File and Content Scanning: dupeGuru can scan both filenames and contents to identify duplicate files. Its filename scan includes a fuzzy matching algorithm that can locate duplicate filenames even if they are not an exact match.
Efficient Fuzzy Matching Algorithm: With dupeGuru's quick fuzzy matching algorithm, you can find your duplicate files in minutes.
Music Mode: Designed specifically for music files, dupeGuru's Music mode can scan tags and display music-related information in the duplicate results window.
Picture Mode: For image files, dupeGuru's Picture mode can scan pictures fuzzily, enabling you to find similar images that are not exactly the same.
Customizable Matching Engine: Adjust dupeGuru's matching engine to suit your needs and find the exact kind of duplicates you want to identify.
Safety Measures: dupeGuru's engine is designed with safety in mind, featuring a reference directory system and grouping system to prevent accidental deletion of files.
File Management Options: In addition to deleting duplicate files, dupeGuru allows you to move or copy them to another location. It also provides various filtering and sorting options to help you weed out false duplicates.
Multi-Language Support: dupeGuru supports multiple languages, including English, French, German, Chinese (Simplified), Czech, Italian, Armenian, Russian, Ukrainian, Brazilian, and Vietnamese.

dupeGuru

dupeGuru is a cross-platform (Linux, OS X, Windows) GUI tool to find duplicate files in a system. It’s written mostly in Python 3 and has the peculiarity of using multiple GUI toolkits, all using the same core Python code. On OS X, the UI layer is written in Objective-C and uses Cocoa. On Linux & Windows, it’s written in Python and uses Qt5.

dupeGurudupeGuru

2- Antares Duplicate File Finder

Antares Duplicate File Finder is a convenient and flexible program for finding duplicate files.

It offers scan settings, the ability to preview files, a user-friendly interface with detailed information, and the option to view file properties.

Platforms: Windows.

Antares Duplicate File Finder

Download Antares Duplicate File Finder for free. Program for finding duplicate files. Antares Duplicate File Finder is a convenient and flexible program for finding duplicate files

SourceForgesrgrass

3- DuplicaErase

DuplicaErase is a free lightweight duplicate file remover tool for Windows. It efficiently identifies and removes duplicate files, freeing up valuable disk space and optimizing storage usage.

Note that some antivirus programs may show false virus alerts due to the file deletion functionality. Avoid using this tool on the "C" drive or where Windows is installed.

DuplicaErase

Download DuplicaErase for free. Introducing a lightweight duplicate file remover tool for Windows. With this software, you can efficiently identify duplicate files, determine the amount of storage occupied by these files, and seamlessly remove them.

SourceForge

4- DuplicateFinder

DuplicateFinder is a small application that helps you find duplicated files on your computer. With a simple interface, you just need to select the hard drive or folder and click start to let the application find the duplicates for you.

Features

Multiple instances and multiple searches with the same instance.
Search a specific drive for duplicates.
Search by name, size, modification date.
Search by ByteByByte.
Search by extension.
Ignore files smaller than or larger than specified size.
Ignore hidden files and system file paths.

DuplicateFinder

Download DuplicateFinder for free. Find duplicated files on your computer. A small application to find duplicates on your computer, the application has a simple interface that is easy to understand, all you need to do is select the hard drive or folder and click start and the application will find the duplicates for you. Like this program?

SourceForgetc101

5- Duplicate file finder (Windows)

Duplicate file finder is a free and open-source app that helps you remove duplicate files and free up system memory.

duplicate file finder

Download duplicate file finder for free. free your system memory from duplicate files . this application finds duplicate file in your system directory

SourceForge

6- DupFinder

DupFinder is a free and open-source duplicate file finder and cleanup tool for Windows XP/Vista/7/8.

It can help free up hard drive space by detecting and removing duplicate files, including files with the same contents but different names, versions of a file, and zero-length files. It offers fast detection and has an easy-to-use and intuitive GUI.

DupFinder

Download DupFinder for free. Free Duplicate File Finder and CleanUp Tool for Windows© XP/Vista/7/8. AFDP can help you free up hard drive space by detecting and removing duplicate files. Duplicate files have exactly the same contents regardless of their name, date, time and location.

SourceForgekarinaop1

6- MediaFileDuplicateFinder

MediaFileDuplicateFinder is a program that helps you find duplicated video, image, and audio files.

It identifies duplicates based on similarity, even if they have different resolution, frame rate, watermark, or video file tags. This cross-platform program is compatible with Windows, Linux, and macOS.

Features

Finds duplicate videos / images based on similarities
Fast scanning speed
Cross-platform: Windows, Linux and MacOS
Windows Installer (MSI package), which includes ffmpeg binaries.
Play/Open Videos and Images from the list of duplicate files.
Optionally select duplicate files with lower resolution for deletion.
Open-source app, released under the GNU Library or Lesser General Public License version 3.0 (LGPLv3)

MediaFileDuplicateFinder

Download MediaFileDuplicateFinder for free. MediaFileDuplicateFinder finds duplicated video, image, & audio files. Media File Duplicate Finder finds duplicated video and image files based on similarity. Finds duplicates which have different resolution, frame rate, watermark, and video file tags.

SourceForgemaisonave

7- Duplicate File Finder 2.2

Duplicate File Finder 2.2 by Autosofted is a free tool that helps users find and delete duplicate files in a specific folder and its sub-folders. It offers features such as full folder and subdirectory file search, a smart progress bar, the ability to detect any type of file, and the option to open file locations and delete selected files.

Key Features

Full folder and folder-subdirectory file search
Smart progress bar
Can detect any type of file
Ability to open file location of selected file
Ability to delete files that you choose

Duplicate File Finder 2.2

Download Duplicate File Finder 2.2 for free. A program used to find duplicate files on your computer. The Duplicate File Finder by Autosofted is a free tool used to search a specific folder for any duplicate files that the folder and it’s sub-folders may have. After detecting the duplicate files, the user then has the option to simply delete all those extra unnecessary files.

SourceForgetechhamster

8- MULTITAS

MULTITAS is a file management software for 64-bit Windows 7/8/10 OS that allows you to remove duplicate files and move files between directories.

MULTITAS

Download MULTITAS for free. File management software for 64 bits windows 7/8/10 os. This program provides these features: 1) Remove duplicate files 2) Move a file from one folder to another. Download the only setup.exe file to windows os laptop then install this program.

SourceForge

9- GDuplicateFinder

GDuplicateFinder is a free cross-platform application that can search for file duplicates, including files on the network. It utilizes Groovy and GPars to process in parallel, making it easy and efficient to remove duplicate files.

Features

Supported network shares (SMB, SSH, Amazon S3, FTP)
Manage network drives(add, edit, remove)
Turn on/off network drives
Save/load duplicates results session
Stop, save, load and resume a search for duplicates
Open duplicate files with system's default editor
Internationalization (Spanish, English, Portuguese, Traditional Chinese, Simplified Chinese)
Receive update notifications

GDuplicateFinder

Download GDuplicateFinder for free. GDuplicateFinder - A FREE Groovy way to find file duplicates! Unlike other duplicate finders such as Easy Duplicate File Finder, Auslogics Duplicate File Finder, MindGems Fast Duplicate File Finder, Duplicate Cleaner, DupFiles and others, GDuplicateFinder is a FREE cross-platform application, with the ability to search among not just local files, but files on the network, such as a Windows or a Linux share using VFS library. Taking advantage of Groovy facilities and GPars power to process in parallel, GDuplicateFinder will help you get rid of those duplicates you always wanted to dispose in an easy and friendly way.

SourceForgemrkaban

10- DUFF

DUFF is a free and open-source GUI duplicate file finder and processor for Windows

11- Doubles

Duplicate Files Finder is a cross-platform application for finding and removing duplicate files by deleting, creating hardlinks or creating symbolic links. A special algorithm minimizes the amount of data read from disk, so the program is very fast.