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nomacs Image Lounge


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This package was approved as a trusted package on 3/24/2017.

nomacs is a free image viewer for windows, linux, and mac systems, which is licensed under the GNU General Public License v3. nomacs is small, fast and able to handle the most common image formats including RAW images. Additionally it is possible to synchronize multiple viewers. A synchronization of viewers running on the same computer or via LAN is possible. It allows to compare images and spot the differences (e.g. schemes of architects to show the progress).


  • Image Viewing

    • supports the most common image formats including RAW

    • fast thumbnail preview

    • zoomable grid preview of thumbnails

    • display exif information

    • framless view

    • change transparency of windows

    • display overview/histogram/file info

    • file filtering/searching/sorting

    • improved anti-aliasing

    • hide menubar and toolbar

  • Image Editing

    • crop images

    • resize images

    • pseudo color function

    • color adjustments (brightness, contrast, saturation …)

    • multi page TIFF export

    • rotate images

    • drag and drop images

    • automatically save screenshots

    • delete/rename images

    • create mosaic image

    • set wallpaper (windows only)

  • Viewer Synchronization

    • synchronize multiple instances

    • synchronized zooming

    • synchronized panning

    • synchronized next/previous file

    • overlay of two or more instances (with changing opacity)

    • arrange synchronized instances

    • synchronize multiple instances in the LAN

    • synchronized zooming

    • synchronized panning

    • images can be sent over LAN connection

See detailed nomacs features page.


  • This package will always install the latest version, regardless of the version specified in the package. Nomacs is using online installer for non-portable package exlusivelly.
  • If you are installing behind the proxy, you will need to configure proxy settings in the installer manually (via Settings button) during the installation. You can use nomacs.portable as alternative in such scenario.

To install nomacs Image Lounge, run the following command from the command line or from PowerShell:

C:\> choco install nomacs --version 3.6.1

To upgrade nomacs Image Lounge, run the following command from the command line or from PowerShell:

C:\> choco upgrade nomacs --version 3.6.1


  • tools\chocolateyInstall.ps1 Show
    $ErrorActionPreference = 'Stop'
    $toolsPath   = Split-Path $MyInvocation.MyCommand.Definition
    $packageArgs = @{
      packageName            = 'nomacs'
      fileType               = 'exe'
      url                    = ''
      url64bit               = ''
      checksum               = 'd3d13450ddff8d368d844e1232f3df23858201cf795fbd742d2e3699cafdf1be'
      checksum64             = 'd3d13450ddff8d368d844e1232f3df23858201cf795fbd742d2e3699cafdf1be'
      checksumType           = 'sha256'
      checksumType64         = 'sha256'
      silentArgs             = '--script "{0}\install-script.js"' -f $toolsPath
      validExitCodes         = @(0)
      softwareName           = 'nomacs*'
    Install-ChocolateyPackage @packageArgs
  • tools\install-script.js Show
     Welcome to the nomacs install script.
     You can run an unattended install by calling:
     nomacs-setup.exe --script auto-install.js
     In this script you change change options such as the target directory
     or which components to install on the client PC.
     Created on: 	02.11.2015
     Author:		Markus Diem
    function Controller()
        installer.setDefaultPageVisible(QInstaller.Introduction, true);
        installer.setDefaultPageVisible(QInstaller.ComponentSelection, true);
        installer.setDefaultPageVisible(QInstaller.PerformInstallation, true);
        installer.setDefaultPageVisible(QInstaller.InstallationFinished, true);
    	installer.setDefaultPageVisible(QInstaller.StartMenuSelection, true);
    	// pages we don't need
        installer.setDefaultPageVisible(QInstaller.TargetDirectory, false);
        installer.setDefaultPageVisible(QInstaller.LicenseCheck, false);
        installer.setDefaultPageVisible(QInstaller.ReadyForInstallation, false);
        installer.setMessageBoxAutomaticAnswer("OverwriteTargetDirectory", QMessageBox.Yes);
        installer.setMessageBoxAutomaticAnswer("stopProcessesForUpdates", QMessageBox.Ignore);
    	// Choose a target dir -----------------------------------------------------
    	// installer.setValue("TargetDir", "C:/nomacs");
    // start installation - here the repo is checked
    Controller.prototype.IntroductionPageCallback = function()
    // choose which components to install
    Controller.prototype.ComponentSelectionPageCallback = function() 
    	// Select your components -----------------------------------------------------
    	// var page = gui.currentPageWidget();
    	// page.selectComponent("nomacs.x86");
    	// page.deselectComponent("nomacs.x64");	
    	// Select your components -----------------------------------------------------
    Controller.prototype.StartMenuDirectoryPageCallback = function () 
    // skip installation finished
    Controller.prototype.PerformInstallationPageCallback = function()
    // close installer
    Controller.prototype.FinishedPageCallback = function()

Virus Scan Results

In cases where actual malware is found, the packages are subject to removal. Software sometimes has false positives. Moderators do not necessarily validate the safety of the underlying software, only that a package retrieves software from the official distribution point and/or validate embedded software against official distribution point (where distribution rights allow redistribution).

Chocolatey Pro provides runtime protection from possible malware.


This package has no dependencies.

Package Maintainer(s)

Software Author(s)

  • Markus Diem
  • Stefan Fiel
  • Florian Kleber


Markus Diem, Stefan Fiel, Florian Kleber


Release Notes

Version History

Version Downloads Last updated Status
nomacs Image Lounge 3.8.0 15062 Saturday, November 11, 2017 approved
nomacs Image Lounge 922 Friday, April 21, 2017 approved
nomacs Image Lounge 3.6.1 384 Friday, March 24, 2017 approved
nomacs Image Lounge 3.6.0 258 Thursday, March 23, 2017 approved
nomacs Image Lounge 3.4.0 478 Thursday, December 8, 2016 approved
nomacs Image Lounge 3.2.0 286 Thursday, April 28, 2016 approved
nomacs Image Lounge 3.0.0 533 Monday, December 21, 2015 approved
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