OptiPNG vs XnView MP
A side-by-side look at OptiPNG and XnView MP. For an in-depth review of either product, follow the links below.
OptiPNG
Photos & Graphics
OptiPNG is an open-source PNG optimizer that reduces the file size of PNG images while preserving transparency. It works by applying lossless compression and interpolation methods.
pngoptimizercompressiontransparency
XnView MP
Photos & Graphics
XnView MP is a free, versatile and powerful photo viewer, image manager, image resizer and more for Windows. It supports over 500 different image formats and has handy image editing tools. It allows batch processing and renaming, metadata editing, EXIF support, and more.
photo-viewerimage-managerimage-resizerbatch-processingmetadata-editingexif-support
Related Comparisons
Windows Photo Viewer
XnView
Gwenview
Windows Live Photo Gallery
QuickViewer
FastStone MaxView