nomacs

6.9easy start · #7 of 35
in Photo Viewer Software

Free to practise onyes
Free trialnot on record
Well documentedyes
Runs where you workyes

Runs on Linux, Mac, Windows.

nomacs is ranked #7 of 35 in photo viewer software on The Geeks Club. It runs on Linux, macOS, Windows. There is a free plan.

nomacs plans and pricing

All plans

nomacs Free Free for private and commercial use · GNU General Public License v3 nomacs.org · 2 Oct 2026

Compared on photo viewer software

Free plan: Yes

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The record

Product: nomacs is a free, open-source image viewer for viewing common image formats, including RAW and PSD images.
Image information: Semi-transparent widgets can display thumbnails, metadata, and histograms; users can add notes to images.
File browsing: nomacs can browse images in ZIP or MS Office files, show a folder thumbnail preview, and filter filenames by text or regular expression.
Editing: Image adjustments include brightness, contrast, saturation, hue, gamma, and exposure, as well as pseudo-color false-color images.
Image comparison: Multiple nomacs instances can synchronize panning and zooming, and images can be overlaid at different opacity for comparison.
Formats: The documented format support depends partly on Qt image plugins, KImageFormats, and optional build features such as ENABLE_RAW and ENABLE_TIFF.
Downloads: The installation page lists Windows 64-bit installer and portable packages, Linux packages and Flatpak/AppImage, and macOS arm64 and x86_64 builds.
Other supported systems: The introduction also lists FreeBSD and OS/2 as supported platforms.
License and use: nomacs is licensed under GNU General Public License v3 and is free for private and commercial use.
Integrations: The FAQ describes its original purpose as helping image-processing users compare images at different processing stages.
Support: The documentation directs users to the project tracker to report bugs or request features, and invites contributions such as translations, ports, and code.
Windows compatibility: The FAQ says Windows XP and Vista are not supported in future development since nomacs 3.0, though version 2.4.6 can be used on those systems.
Founded: 2011
Price from: Free

Where it ranks on The Geeks Club

Best Photo Viewer Software in 2026#7 of 35
Best File Viewer Software in 2026#9 of 31

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Sources

nomacs.org/docs/getting-started/introduction/· checked 2 Oct 2026
nomacs.org/docs/documentation/features/· checked 2 Oct 2026
nomacs.org/docs/getting-started/installation/· checked 2 Oct 2026
nomacs.org/docs/help/faq/· checked 2 Oct 2026
nomacs.org· checked 28 Sept 2026