The best open source alternative to XnView Classic is nomacs. If that doesn't suit you, our users have ranked more than 100 alternatives to XnView Classic and loads of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to XnView Classic are ImageGlass, qView, Gwenview and PicView.
nomacs is a free, open source image viewer, which supports multiple platforms. You can use it for viewing all common image formats including RAW and psd images.
Almost everyone thinks nomacs is a great XnView Classic alternative.
nomacs is the most popular Open Source alternative to XnView Classic.
A feature-rich, simple-to-use app seamlessly integrated with a clean, minimal and modern user interface.
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.
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. Ability to quickly copy / move images to different folders. Can open some extra formats (JPEG-XL, AVIF, APNG, HEIF/HEIC, RAW) via third-party image plugins.
Lightweight Simple Image Viewer with Slide show feature, Resize and Lossless-cut, Color correction, Rename, Multi-language and more...
Shotwell is an open source photo organizer designed for the GNOME desktop environment.
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.
Most users think gThumb is a great XnView Classic alternative.
PhotoQt is a fast and simple, good looking, yet powerful and highly configurable image viewer.
Waterfall-style image viewer for macOS, offering a smooth and immersive browsing experience.
Germany
EU
Vietnam
United States
Denmark
Workflow is trash, and when saving quality is much worse. Also not the formats covered.