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Nomacs

Nomacs is a free, open-source image editor for Windows, macOS and Linux. Nomacs is a free image viewer for windows, linux, and mac systems. It has 3,276 GitHub stars and is released under the GPL-3.0 license. Its source code is on GitHub at nomacs/nomacs.

github.com/nomacs/nomacs (opens in a new tab)

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About Nomacs

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. nomacs is licensed under the GNU General Public License v3 and available for Windows, Linux, FreeBSD, Mac, Haiku, and OS/2.

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FAQ

Nomacs FAQ

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Is Nomacs free and open source?

Yes. Nomacs's source code is public on GitHub under the GPL-3.0 license, which is OSI-approved or FSF-free, so you can use, copy and change it for free.

How do I install Nomacs?

Download the installer for Windows, macOS and Linux from its GitHub Releases page (latest: 3.22.4) or the project website.

Is Nomacs still maintained?

The repository's most recent commit was on Oct 26, 2026. appsgit only lists apps whose repository had a commit in the last six months.