Top Alternatives to Nomacs

IrfanView is a fast, compact, and innovative FREEWARE image viewer and editor for Windows. It supports numerous graphic formats and offers advanced features for batch processing, conversion, and basic image editing.

XnView is a versatile and free multimedia viewer, browser, and converter that supports over 500 image formats. It offers powerful batch processing capabilities for tasks like conversion, renaming, and resizing, making it an essential tool for managing large photo collections.

FastStone Image Viewer is a robust, free image browser, converter, and editor application designed for ease of use and efficiency. It offers a wide range of features for managing and processing digital photographs, making it a versatile tool for both amateur and professional photographers. Its intuitive interface and comprehensive toolset allow for quick browsing, editing, and batch operations.

ACDSee is a powerful suite of software for Windows, macOS, and iOS, offering robust image organization, viewing, and editing capabilities. It provides a comprehensive workflow for photographers, from importing and managing large image libraries to detailed editing and sharing.

Preview is the native image and PDF viewer for macOS. It offers essential tools for viewing, annotating, and basic editing of these file types directly within the Apple ecosystem. Designed for efficiency and low resource use, Preview provides a seamless and integrated experience for handling common document and image formats on Mac computers.

JPEGView is a lean, fast, and highly configurable image viewer for Windows, designed for efficient viewing and basic processing of JPEG, BMP, PNG, and other popular image formats. It excels in performance and offers real-time image processing capabilities.

Gwenview is a robust and user-friendly image viewer for desktop environments, primarily known for its integration with the KDE ecosystem. It offers a clean interface and essential tools for browsing, viewing, and performing basic edits on a wide range of image formats.

Xee is a lightweight and fast image viewer and browser application designed for macOS. It offers a streamlined interface for quickly viewing images in various formats, managing image collections, and performing basic image operations without the need for heavy editing software.

Geeqie is a blazingly fast and extremely customizable Gtk+ based image viewer designed for Unix-like operating systems. It excels at efficient photo browsing, organization, and basic editing, making it an ideal tool for photographers and anyone dealing with large image collections.

Eye of GNOME (EOG) is the default and official image viewer for the GNOME desktop environment, known for its simplicity, speed, and tight integration within the GNOME ecosystem. It provides essential image viewing capabilities with a clean interface.

ImageGlass is a lightweight, versatile image viewing application designed as a modern, fast, and user-friendly alternative to the default Windows Photo Viewer. It supports a wide range of image formats and offers essential viewing tools alongside advanced features through its extensible architecture.

Mylio helps you organize, protect, and access your photos and videos across all your devices without relying solely on cloud storage. It leverages a unique approach to keep your entire library synchronized and accessible, offering powerful organization, editing, and sharing tools.

Viewnior is a lightweight and speedy image viewer designed for GNU/Linux operating systems. It prioritizes simplicity and performance, offering essential features for image browsing and viewing, including fullscreen mode, slideshows, and basic image manipulation, without being burdened by complex functionalities.

Mirage is a lightweight and fast image viewer built with GTK+ and PyGTK. It offers essential image viewing and basic editing functionalities, making it an excellent choice for users prioritizing system performance and simplicity over feature-rich applications. Its lean design ensures quick startup and smooth performance, even on older hardware.

GPicView is a streamlined and exceptionally fast image viewer designed for the X Window System, particularly popular within lightweight desktop environments like LXDE. It prioritizes speed and simplicity over a complex feature set, making it an ideal choice for quickly browsing and displaying image files.

PhotoQt is a fast, simple, and elegant open-source image viewer built with C++/Qt. It offers a clean interface, essential image viewing features, and basic editing capabilities, making it a great choice for quickly browsing and managing your image collection across different operating systems.