What is the HTML5 file format?
A file with the .HTML5 extension is a file known as HTML5 Hypertext Markup Language Revision 5 Source. It belongs to the Web Files category. This format is associated with N/A.
The reliable way to open a .HTML5 file is with software that recognises this exact format, rather than guessing from the file name. If you are not sure what created a file, our file identifier can read its first bytes and name the real format, even when the file has been renamed.
We are still gathering the list of programs that open .HTML5 files. A fully verified, hand-written description of this format is being prepared; until then, the details on this page are drawn directly from our database.
Format details
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