Types of APPCACHE Files

Primary APPCACHE File Association

.APPCACHE

File Format:	.appcache
File Type:	HTML5 cache manifest file

Created by:	W3C
File Category:	Text Files
Registry Key:	HKEY_CLASSES_ROOT\.appcache

Software Programs That Open The HTML5 cache manifest file:

HTML5 cache manifest file by W3C

Windows

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Troubleshooting Problems Opening APPCACHE Files

Common Problems Opening APPCACHE Files

HTML5 cache manifest file is Not Installed

When you double-click your APPCACHE file, you may see a dialog box from your operating system stating that it "Cannot Open This File Type". If this is the case, it's usually due to the fact that you do not have HTML5 cache manifest file for %%os%% installed on your computer. Because your operating system doesn't know what to do with this file, you won't be able to open it by double-clicking.

Tip: If you know of another program that can open your APPCACHE file, you can try opening it by selecting the application from the programs listed.

Wrong Version of HTML5 cache manifest file is Installed

In some cases, you might have a newer (or older) version of a HTML5 cache manifest file file that is unsupported by your installed application version. If you do not have the proper version HTML5 cache manifest file (or any of the other programs listed above), you may need to try downloading a different version of it, or one of the other software applications listed above. This problem is most common when you have an older version of the software application, and your file was created by a newer version that it cannot recognize.

Tip: Sometimes you can get a clue about the version of APPCACHE file you have by right clicking on the file, then clicking on "Properties" (Windows) or "Get Info" (Mac OSX).

Summary: In either case, the majority of problems opening APPCACHE files are related to not having the correct software application installed on your computer.

Other Causes of APPCACHE File Opening Problems

Although you might already have HTML5 cache manifest file or another APPCACHE-associated software installed on your computer, you can still encounter problems opening HTML5 cache manifest file files. If you are still having problems opening APPCACHE files, there may be other issues that are preventing you from opening these files. These other problems include (listed in order from most to least common):

• Invalid APPCACHE file references in the Windows Registry (the "phonebook" of the Windows Operating System)
• Accidental deletion of the description of the APPCACHE file in the Windows registry
• Incomplete or bad installation of a software application associated with the APPCACHE format
• Your APPCACHE file is corrupted (issues with your HTML5 cache manifest file file itself)
• Your APPCACHE is infected with malware
• Device drivers of the hardware associated with your APPCACHE file are corrupt or out-of-date
• Your computer does not have the adequate system resources to open the HTML5 cache manifest file format