>> AP4 file

AP4 file format description

Many people share .ap4 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .ap4 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .ap4 files.

1 filename extension(s) found in our database.

.ap4 - Kids&Us Storybook Audio File

The AP4 audio files are related to Kids&Us Talking Pen. The AP4 file is a Kids&Us Storybook Audio File. Kids&Us is a language school specialized in children from 1 year old.

Kids&Us Talking Pen
Audio files
- / -
Kids&Us Storybook Audio File related extensions:
Grandstream IP Phone Ringtone
DTS-HD Master Audio Suite Data
A-Law Compressed Audio File
Adaptive Multi-Rate WideBand Audio
Adaptive Multi-Rate Audio
Valve Xbox360 Audio Data

Naturally, other applications may also use the .ap4 file extension. Even harmful programs can create .ap4 files. Be especially cautious with .ap4 files coming from an unknown source!

Can't open a .ap4 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .ap4 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

a4p, ap, ape, apr, apt, p4, pa4, wp4, xp4

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Lotus Approach 97 Document
Corel WordPerfect Document
Nimbus 7 SAMS APRIORI Data
ArcView Project
KiriKiri Package
Alphacam Punch Tool Data

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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If you have useful information about the .ap4 file format, then write to us!