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The '''webarchive''' file format is available on [[macOS]] and [[Windows]] for saving and reviewing complete web pages using the [[Safari (web browser)|Safari web browser]].<ref name="folderize">{{cite web |last1=Frakes |first1=Dan |title=De-archive Web Archives |url=https://www.macworld.com/article/1050198/webarchivefolderizer.html |website=Macworld |publisher=IDG Communications |accessdate=15 June 2018}}</ref> The webarchive format differs from a standalone [[HTML]] file because it also saves linked files such as images, [[Cascading Style Sheets|CSS]], and [[JavaScript]].<ref>{{cite web|last1=Arnott|first1=Nick|title=Apple declines to fix vulnerability in Safari's Web Archive files, likely because it requires user action to exploit|url=http://www.imore.com/apple-declines-fix-vulnerability-safaris-webarchive-files-likely-because-it-requires-user-action|website=iMore|publisher=Mobile Nations|accessdate=7 February 2015}}</ref> The webarchive format is a concatenation of source files with filenames saved in the binary [[Property list|plist]] format using NSKeyedArchiver.{{Citation needed|date=October 2008}} 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
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* A version of the webarchive format is used to bundle whole music albums and movies with extra content and menus inside [[iTunes LP|iTunes LP and Extras]].{{Citation needed|date=March 2012}}
* Webarchives are automatically generated for ads submitted to Apple's [[iAd]] advertising platform.<ref>{{cite web|title=iAd JS Programming Guide: Web Archives and Manifest Files|url=https://developer.apple.com/library/iad/documentation/UserExperience/Conceptual/iAdJSProgGuide/CreatingBundles/CreatingBundles.html#//apple_ref/doc/uid/TP40010301-CH15-SW6|website=Mac Developer Library|publisher=Apple|accessdate=7 February 2015}}</ref>
* The [[WebKit]] framework's WebArchive class is used to simplify cutting-and-pasting with whole or partial web pages.<ref>{{cite web|title=WebArchive Class Reference|url=https://developer.apple.com/library/mac/documentation/Cocoa/Reference/WebKit/Classes/WebArchive_Class/index.html|website=Mac Developer Library|publisher=Apple|accessdate=7 February 2015}}</ref>
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In February 2013, a vulnerability with the webarchive format was discovered and reported by Joe Vennix, a [[Metasploit Project]] developer. The [[exploit (computer security)|exploit]] allows an attacker to send a crafted webarchive to a user containing code to access [[HTTP cookie|cookies]], local files, and other data. Apple's response to the report was that it will not fix the bug, most likely because it requires action on the users' part in opening the file.<ref>{{cite web|last1=Vennix|first1=Joe|title=Abusing Safari's webarchive file format|url=https://community.rapid7.com/community/metasploit/blog/2013/04/25/abusing-safaris-webarchive-file-format|website=Rapid7 Metasploit|publisher=Rapid7|accessdate=7 February 2015}}</ref>
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Workarounds to allow the file to be viewed in other browsers are possible, though specific webpage contents may hinder this process. This requires one of the free tools [[WebArchive Folderizer]] (for OS X 10.2 and higher)<ref name="folderize"/> or [[WebArchive Extractor]] (for OS X 10.4.3 and higher).<ref>[https://robrohan.github.io/WebArchiveExtractor/ WebArchive Extractor]</ref>
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[[Mozilla Archive Format|MAFF]] is an open format (with a published specification) that enables saving of whole webpages in a single file. It is currently supported by [[Firefox]], using an extension.<ref>{{cite web |url=https://addons.mozilla.org/en-US/firefox/addon/mozilla-archive-format/ |title=Mozilla Archive Format, with MHT and Faithful Save |accessdate=8 December 2011}}</ref> Other web browsers use the [[MHTML]] format or do the equivalent by saving a directory of inline resources (usually images) alongside the [[HTML]] file, sometimes compressed, like the [[KDE WAR (file format)|.war]] format used by [[Konqueror]] (tar+gzip or tar+bzip2). Safari does not support these alternative archive formats.
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[[HTMLD]] (HTML Directory) is a NeXT-developed format for saving web pages and their dependencies in a [[Archive file|bundle]] that may also be served by a web server.<ref>{{cite web|url=http://xent.com/~rohit/HTMLD-Spec.htmld/index.html|title=.htmld Discussion}}</ref>
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<references/>
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[[Category:Archive formats]]
[[Category:Web browsers]]
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