Files that contain the .webarchive file extension are associated with the Safari Internet browsing application. The WEBARCHIVE files that are used by this software contain HTML pages that have been saved by the Safari browser for offline viewing.
The Safari Internet browser is used by Mac computers and is similar to the Internet Explorer used by Windows computer users. When a Mac user creates a WEBARCHIVE file using Safari, it allows them to view the web page that is associated with the file even when their computer is not connected to the Internet. However, if the page is a dynamic or interactive page, the WEBARCHIVE file will only store the basic information and the user will not be able to access the full features of the web page through the WEBARCHIVE file.
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If you have additional information about the WEBARCHIVE file format or software that uses files with the WEBARCHIVE suffix, please do get in touch - we would love hearing from you.