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Webarchive

The webarchive file format is available on Mac OS X and Windows for saving and reviewing complete web pages using the Safari web browser. The webarchive format differs from a standalone HTML file because it also saves linked files such as images, CSS, and JavaScript. The webarchive format is a concatenation of source files with filenames saved in the binary plist format using NSKeyedArchiver. Support for webarchive documents was added in Safari 4 Beta on Windows and is included in subsequent versions. Safari for iOS (iPhone and iPad) does not support web archive files natively, however a third party app provides this functionality.