PhotoViewerPro
True full-screen viewer with photo zoom support. Customizable image magnifier. Powerful image editing tools. Resize/resample, rotate/flip, crop, sharpen/blur, adjust lighting/colors/curves/levels, etc. Eleven re-sampling algorithms to choose from when resizing images. Image color effects, grayscale, sepia, negative, red/green/blue adjustment Image special effects. Annotation, drop shadow, framing, bump map, sketch, oil painting, lens. Draw texts, lines, highlights, rectangles, ovals, and callout objects on images. Clone stamp and healing brush. Superior red-eye effect removal/reduction with a completely natural-looking end result. Multi-level undo/redo capability. One-touch best fit/actual size image display support. Image management, including tagging capability, with drag-and-drop and copy-to/move-to folder support. Histogram display with a color counter feature. Compare images side-by-side (up to 4 at a time) to easily cull those forgettable shots. Image EXIF metadata support.
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XnView
XnView MP/Classic is a free Image Viewer to easily open and edit your photo file. The Image Viewer supports all major image formats (JPEG, TIFF, PNG, GIF, WEBP, PSD, JPEG2000, OpenEXR, camera RAW, HEIC, PDF, DNG, CR2). As Image Viewer you have features like color adjusting, image resizer, cropping, screen capture, metadata editing (IPTC, XMP) and much more. With its easy-to-use explorer-like interface, XnView MP allow you to quickly view your images and photos, but also to make image management. You have features like batch rename, batch converter, duplicate image finder, image compare, but you can also create contact sheets, slideshow.
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ApolloOne
ApolloOne is a powerful image viewer and manager designed for seasoned amateurs and professional photographers. The design objectives are ease of use and speed and lots of it. Arguably the fastest image viewer ever created for the macOS, it works with your existing folder structure without ever needing to import files into a database. It offers a comprehensive set of tools for photographers, smart memory card imports, displaying camera AF points, rating and culling images, managing metadata, searching and filtering, batch renaming, and much more. Easy to use interface with unique HUD display, maximizes image display area, especially on a Macbook. Browsing history for quickly switching between multiple events or projects. Rotate, mirror, and flip photos and videos instantly. Correct orientation of JPEGs without altering image data. EXIF metadata inspector with search and edit features. Add tags to your favorite list for quick filtering.
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Handy Viewer
Handy Viewer provides an all-in-one solution for photo viewing and editing.
Handy Viewer boasts a user-friendly interface that offers an effortless experience right from the start. All required plug-ins and codecs are included, eliminating the need for cumbersome downloads. Navigating through folders and finding specific images is a breeze thanks to hotkey support and three different viewing modes you can choose from.
One standout feature of Handy Viewer is its extensive format compatibility. Whether it's JPEG, TIFF, PNG, or even the latest HEIC image format, Handy Viewer will open and display nearly any image file format. Moreover, Handy Viewer shines when it comes to video playback as well. In total, more than 150 formats are supported.
Photo editing and ability to apply effects is another important feature of this program. Handy Viewer allows you to resize, crop and rotate your images. The brightness, contrast, saturation, gamma can be configured as well.
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