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Nomacs

Nomacs is a free, open-source image viewer for desktop users on Windows, Linux, macOS, and other platforms who need to view common image formats, including…

Media Applications
Tools & Utilities

Nomacs is a free, open-source image viewer for desktop users on Windows, Linux, macOS, and other platforms who need to view common image formats, including RAW and PSD files.

Platform availability

Available on 1 of 9 platforms

Unraid
TrueNAS (not listed)
Umbrel (not listed)
ZimaOS (not listed)
Proxmox (not listed)
Helm (not listed)
Mac (not listed)
Windows (not listed)
Linux (not listed)

Health score

Not enough data yet for a health score. It needs at least 2 of 4 factors: maintenance, popularity, ease of install, resource needs.

Availability: platform listings confirmed today

GitHub stars: 3,240
Open issues: 339
Last commit: 2026-10-05
Latest release: 3.22.4
License: GPL-3.0
Activity: declining

Checked today - source: GitHub (nomacs/nomacs)

Resources & Compatibility

Minimum requirements: 1 GB RAM, 2 CPU core(s).

Checked today - source: Docker Hub image tags and published docs

First-install notes

Install Follow the official Nomacs installation guide for your operating system, and check the GitHub releases page for current desktop builds. source

Fetched today - each note links to its source

Alternatives

No alternatives collected yet.

Common questions

What license does nomacs use?

Nomacs is licensed under the GNU General Public License v3.

How can I get updated versions of nomacs?

The README points to the latest stable release, the latest beta release, and continuous builds for Windows or Linux/macOS.

How can I add AVIF, HEIC/HEIF, and JPEG XL/JXL support when building for Linux?

Use the optional kimageformats-plugins dependency, and make sure its Qt version matches the Qt version used to compile nomacs.

Why was nomacs removed from a Debian package?

The report says it appears to have been removed along with other older packages that were being cleaned out.

Answers sourced from github.com, www.reddit.com

Community

'nomacs' image viewer in need of help : r/linux - Reddit (reddit)
Nomacs viewer and its future : r/linux - Reddit (reddit)
Why did Nomacs get removed? : r/debian - Reddit (reddit)
nomacs' dependencies size : r/Fedora - Reddit (reddit)
The amount of dependencies for Nomacs : r/Fedora - Reddit (reddit)
nomacs | A great alternative to windows image viewer - Reddit (reddit)

Collected today - public community threads