KEY file format
File Viewer Lite
The KEY file extension is used for Keynote Presentations. Apple made the software for the creation and playback of presentations. The Mac OS X package is used to store presentations. The file has all to play presentations. It comes with platforms like slides, images, transition information, and text for presentation. Also, the KEY file can be a storage device for the XML data used for presentations. It was introduced in 2003 to compete with PowerPoint.
Specifications for Keynote files are not available, but one can reference the iWork '05 file format by Apple. The key file is a compressed ZIP file with other files to make up the .key file. Its new version saves a file with an "index" directory with Apple's proprietary IWA file format, a "Metadata directory with .plist files, a "Data" directory with image assets like backgrounds and photos for slides, and jpg files for previewing. Keynote files in iWork can only be opened by iWork.