• fast read and write access to the Exif, IPTC, and XMP metadata of an image. • an easy to use and extensively documented API. • conversions of Exif and IPTC metadata to XMP and vice versa. • a smart IPTC implementation that does not affect data that programs like Photoshop store in the same image segment. • Exif Makernote support: ◦Makernote tags can be read and written just like any other metadata. ◦a sophisticated write algorithm avoids corrupting the Makernote. • a simple interface to extract previews embedded in RAW images and Exif thumbnails. • set and delete methods for Exif thumbnails.

It supports: * HTML5/JavaScript Viewer controls * zero-footprint deployment * signed and unsigned extended grayscale images * client-side caching of downloaded image data to increase reload speed and reduce network traffic.