How to open HTML5 cache manifest .appcache files
Have you had trouble opening the appcache file on your computer? What are appcache files? We explain what they are and recommend software that we know will open them.
What is appcache file?
An appcache file extension is related to the HTML5 markup language and used for its cache manifest files.
HTML5 cache manifest description
The appcache file extension is associated with the HTML5, a new modern markup language for structuring and presenting web content.
The .appcache file stores data used to run web application written in HTML without Internet connection.
Suggested software to open appcache file

Sublime Text
A sophisticated source code editor for programmers