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Is there an image duplicate finder program that works on Windows or Linux that can search a folder to find duplicates and near duplicates (different resolutions, compression modes, etc) in the WebP image format? I don't care if the program is freeware or costware. I want something just like the program VisiPics, which searches a batch of images for images that are the same picture. Visipics can even find duplicated images that have different dimensions. But Visipics doesn't work with the WebP image format. It's easy to find image duplicate finders, but I haven't been able to find one that works with WebP image files.

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  • @Kodiologist That answer doesn't address my needs. WebP isn't even mentioned in that answer, so I don't know why you think it would apply to this question. – user8547 May 21 '17 at 6:42
  • @Izzy I just updated the question. – user8547 May 21 '17 at 6:43
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    "WebP isn't even mentioned in that answer" — That doesn't mean it doesn't work with WebP. In particular, as @Izzy says, a program doesn't need to know anything about file fomats in order to find bit-for-bit identical files. – Kodiologist May 21 '17 at 14:19
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    @Kodiologist converting them all to find the dupes is not a recommended approach, as it first creates even more dupes :) But OP has a point if the tool should also find the same picture in (slightly) different resolutions or compression modes, keeping the best one (aka "master") only – which seems kind of what VisiPics offers. If that's a requirement we can of course only tell if OP lets us know :) – Izzy May 21 '17 at 16:14
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Yes there is: Duplicate Photo Finder

I use it for years now and it is updated regularly.

enter image description here

Here is the list of the supported file format: Supported file formats:

JPEG Bitmap (*.jpg;*.jpeg;*.jpe)
Compuserve Bitmap (*.gif)
Portable Network Graphics (*.png)
TIFF Bitmap (*.tif;*.tiff;*.fax;*.g3n;*.g3f)
JPEG2000 Files (*.jp2)
JPEG2000 Code Stream (*.j2k;*.jpc;*.j2c)
Targa (*.tga;*.targa;*.vda;*.icb;*.vst;*.pix)
Paintbrush (*.pcx)
Windows Bitmap (*.bmp;*.dib;*.rle)
Windows Metafile (*.wmf)
Enhanced Windows Metafile (*.emf)
Windows Icon (*.ico)
Windows Cursor (*.cur)
Wireless Bitmap (*.wbmp)
Portable Pixmap (*.pxm;*.ppm)
Adobe Photoshop (*.psd)
Camera RAW (*.crw; *.cr2; *.nef; *.raw; *.pef; *.raf; *.x3f; *.bay; *.orf; *.srf; *.mrw; *.dcr; *.sr2; *.dng; *.erf; *.mef; *.arw) (only in Pro and Corporate versions)
DICOM Images (*.dcm) (only in Corporate version)
HDPhoto Images (*.hdp; *.wdp; *.jxr) (only in Pro and Corporate versions)
WebP Images (*.webp) (only in Pro and Corporate versions)

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