The best open source alternative to nomacs is ImageGlass. If that doesn't suit you, our users have ranked more than 50 alternatives to nomacs and loads of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to nomacs are qView, Gwenview, JPEGView and PicView.
A feature-rich, simple-to-use app seamlessly integrated with a clean, minimal and modern user interface.
Almost everyone thinks ImageGlass is a great nomacs alternative.
ImageGlass is the most popular Open Source alternative to nomacs.
Fast and lightweight Qt-based image viewer with support for Windows, macOS, and Linux. Features include multiple format support, customizable interface, GIF playback, high-resolution display compatibility, and efficient navigation through keyboard shortcuts.
Offers quick browsing and display of various image formats, basic editing tools like crop, rotate, lossless JPEG manipulation, folder browsing as thumbnails or slideshows, supports XCF, drag-and-drop, metadata viewing, KDE integration, and plugin extensions.
Lightweight Simple Image Viewer with Slide show feature, Resize and Lossless-cut, Color correction, Rename, Multi-language and more...
PicView is a fast, free and fully customizable picture viewer for macOS and Windows 10/11. It supports virtually all image file types, including (animated) WEBP, (animated) GIF, SVG, AVIF, HEIC, PSD and many others.
Qt5 image viewer with optional video support. Contribute to easymodo/qimgv development by creating an account on GitHub.
Video playback, better UI and grid layout and can move, cut, copy & paste files.
Desktop app for photo sorting on Windows & Mac, managing JPG+RAW files. Sort photos into folders using keys, providing easy navigation and clean interface without deletion, ensuring a focused experience with flexible viewing, safe storage, and no fluff.
gThumb is an image viewer and browser for the GNOME Desktop. It also includes an importer tool for transferring photos from cameras.
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.
Waterfall-style image viewer for macOS, offering a smooth and immersive browsing experience.
Geeqie is a free open software image viewer and organiser program for Linux, FreeBSD and other Unix-like operating systems.
PhotoQt is a fast and simple, good looking, yet powerful and highly configurable image viewer.
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Many functions, able to show multiples images, easy save image...