What is the P4F file format?
A file with the .P4F extension is a file known as MU Online [P4F] Launcher System Data. It belongs to the Game Files category. This format is associated with Webzen.
The reliable way to open a .P4F 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 .P4F 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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