Nomacs – Free image viewer

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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).



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 (cool for displaying highly textured images)
hide menubar and toolbar
image information (e.g. date created)
play/pause with user defined time interval
adjustable background color


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)
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

Install nomacs in ubuntu

Open the terminal and run the following commands

sudo add-apt-repository ppa:nomacs/stable
sudo apt-get update
sudo apt-get install nomacs



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2 Responses

  1. Bodie says:

    Is there an undo function? I couldn’t find one anywhere, and it’s kind of a big deal for me. Other than that, it’s looking pretty good.

  2. Rockstring says:

    I use this amazing viewer on Windows, Android and Mac, and I wish CoolUtils Photo Viewer, which I like very much and which runs on Windows only, were anywhere near as cross-platform as this one. I hope it will be soon though)

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