FastStone Image Viewer is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The best Linux alternative is XnView MP. It's not free, so if you're looking for a free alternative, you could try nomacs or qView. If that doesn't suit you, our users have ranked more than 100 alternatives to FastStone Image Viewer and many of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to FastStone Image Viewer are gThumb (Free, Open Source), qimgv (Free, Open Source), Gwenview (Free, Open Source) and Eye of GNOME (Free, Open Source).
nomacs is a small, fast image viewer able to handle the most common image formats including RAW images. Additionally it is possible to synchronize multiple viewers. A synchronization of viewers running on the same computer or via LAN is possible.
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Most users think nomacs is a great alternative to FastStone Image Viewer.
gThumb is an image viewer and browser for the GNOME Desktop. Features Image Viewer * View single images (including GIF animations). Supported image types are: BMP, JPEG, GIF, PNG, TIFF, ICO, XPM. * View EXIF data attached to JPEG images.
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gThumb vs FastStone Image Viewer opinions
Some users think gThumb is a great alternative to FastStone Image Viewer, some don't.
Eye of GNOME is the official image viewer for the GNOME Desktop environment. With it, you can view single image files, as well as large image collections. The Eye of GNOME supports a variety of image file formats.
PhotoQt is a simple, yet powerful and good looking image viewer, written in Qt, published as open-source, and completely free. Photo comes with a variety of features. Most features you would expect from a image viewer should be there.
QuickViewer is a graphic image viewer for comfortable browsing of many images. This software performs reading of image data in advance. And drawing the imported image data on the screen with OpenGL. You can browse images with much smoother response than ever before.