Apps similar to PhotoQt include IrfanView, which is free for personal use. Other options are ImageGlass, nomacs, FastStone Image Viewer and qView. Image Viewers like PhotoQt are a crowded field, with more than 50 alternatives for Windows, Linux, Mac, iPhone and iPad.
Vipsdisp can display huge (many, many gigabyte) images quickly and without using much memory. As well as the usual PNG, JPG, TIF, PDF, SVG, WEBP, JP2, JXL and GIF, it supports many scientific and technical image formats, including SVS, MRXS, OpenEXR, FITS, Matlab, NIfTI...
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View directly, image pinning, diverse formats, and EXIF information. Optimized for viewing long images, the perfect mac platform image viewer.
Xviewer is a simple image viewer which uses the gdk-pixbuf library. It can deal with large images, and zoom and scroll with constant memory usage. Its goals are simplicity and standards compliance. Xviewer is installed by default in Linux Mint.
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Image viewer offering support for HDR, RAW, extensive formats, webtoon mode for comics, fast navigation, batch conversion, slideshow, detail zoom, drag-and-drop, efficient browsing, keyboard shortcuts, multi-monitor support, and portable usage options.
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Imagot is an image viewer which aims to provide an open source alternative to Microsoft Photos or similar apps (and be multiplatform). It supports common image file types such as PNG, JPEG, SVG, etc.
Its minimalistic interface provides more screenspace for your images. Among its features are:
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Lenscape is a macOS photo viewer software optimized for Apple Silicon. It allows users to view, manage, and customize their photos and videos in various modes like gallery, full screen, or thumbnail. Users can also select photos and videos to move, copy, trash, or share them.
Picturama is a free and open-source image organizer for the desktop built on Electron and powered by web technology.
Quick Picture Viewer is a lightweight, versatile desktop image viewer for Windows. The best replacement for the default Windows photo viewer.
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Unifie is a fast, thumbnail-focused image viewer with dual viewing surface that lets you see two folders of images side-by-side for easy comparison.
Mirage is a fast and simple GTK+ image viewer. Because it depends only on PyGTK, Mirage is ideal for users who wish to keep their computers lean while still having a clean image viewer.
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