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nomacs is a free image viewer, which supports multiple platforms. You can use it for viewing all common image formats including RAW and psd images.

nomacs features semi-transparent widgets that display additional information such as thumbnails, metadata or histogram. It is able to browse images in zip or MS Office files which can be extracted to a directory. Metadata stored with the image can be displayed and you can add notes to images. A thumbnail preview of the current folder is included as well as a file explorer panel which allows switching between folders. Within a directory you can apply a file filter, so that only images are displayed whose filenames have a certain string or match a regular expression. Activating the cacher allows for instantly switching between images.

nomacs includes image manipulation methods for adjusting brightness, contrast, saturation, hue, gamma, exposure. It has a pseudo color function which allows creating false color images. A unique feature of nomacs is the synchronization of multiple instances. With this feature you can easily compare images by zooming and/or panning at the exactly same position or even by overlaying them with different opacities.
nomacs is licensed under the GNU General Public License v3 and available for Windows, Linux, FreeBSD, Mac, and OS/2. If you want to report any bugs or request new features please use ourĀ tracker.

nomacs 2.4.0

the new 2.4.0 release is a milestone in our development. First, it will be the last feature release which mainly supports Qt 4 (again the numbers align perfectly: 2.4). Second, it is probably the hugest feature release ever. The most important features include tabs, an all-in-wonder batch processing, and an improved thumbnail preview. Good news for all Windows XP and Vista users (who should definitely update their system : ), we compiled nomacs a last time for these systems. Here is the full changelog:

  • Batch processing (you can try it by clicking Tools > Batch Processing)
  • Image tabs (open multiple images within different tabs)
  • Thumbnail preview improved (copy/paste delete/rename is now supported)
  • Zoom panel improved (you can now chose a specific zoom level)
  • Olympus RAW added
  • Convert to grayscale added (thanks to shreelock)
  • Faster directory loading (especially if you have many images in a folder)
  • Gesture improvements
  • Saving of images from archives (e.g. zip, docx) is now supported
  • File sorting improved (Unix-based systems only)
  • Stability improvements

- the nomacs team

nomacs 2.4.0 written by markus average rating 5/5 - 4 user ratings