nomacs is a free image viewer for Windows, Linux, and macOS, with support for common image formats including RAW and PSD. It can show image thumbnails, metadata, and histograms in semi-transparent widgets, and users can add notes. For browsing, it can open images inside ZIP and MS Office files, preview folder contents, and filter filenames by text or regular expression. Editing controls cover brightness, contrast, saturation, hue, gamma, and exposure, with pseudo-color rendering also available. For comparison work, multiple instances can synchronize panning and zooming, and images can be overlaid at different opacity. Format availability depends partly on image plugins and optional build features. The program is licensed under GNU General Public License v3 and is free for private and commercial use. Downloads include Windows installer and portable packages, Linux packages and Flatpak/AppImage, and macOS arm64 and x86_64 builds. FreeBSD and OS/2 are also listed as supported systems.
Who it is for
nomacs suits people who need a no-cost viewer across desktop systems, especially those comparing image versions or inspecting image metadata. It also serves users who need basic image adjustments or browsing within archives and office files.
What is good
- Free for private and commercial use
- Supports RAW image viewing
- Shows metadata and histograms
- Can synchronize image comparison views
- Offers brightness, contrast, and exposure adjustments
What to know first
- Format support can vary by build
- Windows XP and Vista lack future development support
- Some formats depend on optional features
Verdict
nomacs combines image browsing, basic adjustments, and comparison tools without a usage fee. Check the available build's format support and system compatibility before relying on it.
nomacs plans and pricing
All plansCompared on photo viewer software
- Free plan
- Yes
