AntiDupl
AntiDupl searches image collections for similar or defective pictures, helping users locate duplicates across large sets of files.
About AntiDupl
AntiDupl searches image collections on disk by comparing file contents, so it can find almost identical images as well as similar ones. It can also find images with some types of defects and display matching files for review. The project includes AntiDupl.NET with Russian and English interfaces, and AntiDuplX, a command-line tool for Linux and Windows.
Key features
- Finds duplicate images by comparing file contents
- Detects similar as well as almost identical images
- Finds images with some types of defects
- Supports JPEG, GIF, TIFF, BMP, PNG, WEBP, HEIC, AVIF and more
- Offers Russian and English interfaces
- Provides AntiDuplX command-line tool for Linux and Windows
Best for: People with large local image collections who need to find similar, duplicate, or defective files.
Good for
- Open-source software under MIT license
- Compares image content rather than filenames
- Supports many listed image formats
Watch out for
- Defect detection covers only some types of defects
- Interface limited to Russian and English
- Building from source requires Visual Studio and vcpkg setup
AntiDupl at a glance
- Category
- Online Tools › Image Tools
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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AntiDupl FAQ
What image formats can AntiDupl check?
JPEG, GIF, TIFF, BMP, PNG, EMF, WMF, WEBP, EXIF, ICON, JP2, PSD, DDS, HEIF, HEIC, TGA, AVIF and JXL.
Does AntiDupl find only exact duplicates?
No. Comparison is based on file contents, so it can find almost identical and similar images.
Is there a command-line version?
Yes. AntiDuplX searches for similar and damaged images and works on Linux and Windows.
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