nomacs - Image Lounge

nomacs is a free, open source image viewer

Graphics & Design

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Screenshots & videos

About

nomacs features semi-transparent widgets that display additional information such as thumbnails, metadata or histogram. It is able to browse images in zip or MS Office files which can be extracted to a directory. Metadata stored with the image can be displayed and you can add notes to images. A thumbnail preview of the current folder is included as well as a file explorer panel which allows switching between folders. Within a directory you can apply a file filter, so that only images are displayed whose filenames have a certain string or match a regular expression. Activating the cache allows for instantly switching between images.

Additional information

Project

Developer: Markus Diem
License: GPL-3.0 (free software)What this license lets you do
Homepage: nomacs.org
From the project: Report a bug Source code

Install

Available via: Flatpak · Arch Linux (2) · Debian · Ubuntu · Fedora · openSUSE · Alpine Linux · Void Linux (2) · Solus · Gentoo · Nixpkgs
All 13 packagings
Flathub (Flatpak), AUR, AUR (Git build), Debian, Ubuntu, Fedora, Nixpkgs, openSUSE, Alpine Linux, Void Linux, Void Linux (32bit build), Solus, Gentoo
Flatpak sandbox: Wide access
Runs in a sandbox, but a broad part of it is open — typical for tools that need to manage your files or system. It shows what the app is able to do, not what it does.
What it can access
Reads and changes your whole home folder
Reads and changes files in /media
Reads and changes files in /mnt
Reads and changes files in /run/media
Plays and records audio

About this data

Sources: Sources disagree on the name: nomacsimagelounge / nomacs
Catalog data as of: October 12, 2026

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How each source lists it (13)

Source	Name	Version	Built by	License	Description
Flathub (Flatpak)	nomacs - Image Lounge	3.23	Official build	GPL-3.0	nomacs is a free, open source image viewer
AUR	nomacs	1:3.23.3-1	—	GPL-3.0-only	A Qt image viewer
AUR (Git build)	nomacs-git	3.23.1.r15.gd5ae2741-1	—	GPL-3.0-only	Free, open source image viewer, which supports multiple platforms.
Debian	nomacs	3.21.0+dfsg-2	Distribution build	—	image viewer with capability of syncing multiple instances
Ubuntu	nomacs	3.21.1+dfsg-1	Distribution build	—	image viewer with capability of syncing multiple instances
Fedora	nomacs	3.22.1	Distribution build	GPL-3.0-or-later AND LicenseRef-Callaway-CC-BY	Lightweight image viewer
Nixpkgs	nomacs	3.23.3	Distribution build	GPL-3.0-or-later	Qt-based image viewer
openSUSE	nomacs	3.23.3	Distribution build	GPL-3.0-or-later	Lightweight image viewer
Alpine Linux	nomacs	3.21.1-r4	Distribution build	GPL-3.0-or-later	Cross platform image viewer
Void Linux	nomacs	3.17.2287_5	Distribution build	GPL-3.0-or-later	Simple yet powerful Qt imageviewer
Void Linux (32bit build)	nomacs-32bit	3.17.2287_5	Distribution build	GPL-3.0-or-later	Simple yet powerful Qt imageviewer (32bit)
Solus	nomacs	3.16.224	Distribution build	GPL-3.0-or-later	nomacs is a free, open source image viewer
Gentoo	nomacs	3.22.0	Distribution build	GPL-3.0-or-later	Qt-based image viewer