Nomacs
nomacs lets users view images on Windows, Linux, and macOS through a cross-platform viewer.
About Nomacs
Nomacs is an open-source image viewer for viewing common image formats including RAW and PSD images. It is available for Windows, Linux, FreeBSD, Mac, Haiku, and OS/2 and is licensed under the GNU General Public License v3.
Additional formats and functions depend on build and runtime dependencies. Linux/Unix builds require Qt6, while AVIF, HEIC/HEIF and JPEG XL need matching kimageformats-plugins and zip reading needs Quazip.
Key features
- View common image formats including RAW and PSD images
- Run on Windows, Linux, FreeBSD, Mac, Haiku, and OS/2
- Read AVIF, HEIC/HEIF, and JPEG XL with optional plugins
- Read multi-page TIFF when built with LibTiff support
- Read images from zip files when built with Quazip
- Use optional plugins for paint, composite, and affine transform
Best for: People who want a desktop open-source viewer for common, RAW, and PSD images on multiple operating systems.
Good for
- Open source and licensed under GNU General Public License v3
- Supports Windows, Linux, FreeBSD, Mac, Haiku, and OS/2
- Handles common formats including RAW and PSD images
Watch out for
- Linux/Unix builds require Qt6
- AVIF, HEIC/HEIF, and JPEG XL need optional matching kimageformats-plugins
- Zip file reading needs Quazip and is not enabled by default as of 3.19.1
Nomacs at a glance
- Website
- github.com/nomacs/nomacs
- Category
- Online Tools › Image Tools
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Linux, Windows
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Nomacs FAQ
Which operating systems does nomacs support?
Windows, Linux, FreeBSD, Mac, Haiku, and OS/2.
How can additional formats like AVIF, HEIC/HEIF, and JPEG XL be read?
Through the optional kimageformats-plugins dependency using the same Qt version used to compile nomacs.
What license covers nomacs?
GNU General Public License v3.
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