Battle.net settings update
File type: Settings, options, themes or skins file
An mfil file extension is used by the Battle.net client from Blizzard Entertainment. An mfil file stores settings related to game updates.
File type category:
Settings, options, themes or skins file
Date updated: October 19, 2026
The mfil file extension is associated with the Battle.net client used with Blizzard Entertainment games, including Diablo III, World of Warcraft, StarCraft II, Diablo II, Diablo, and Starcraft.
The Battle.net client manages game updates and connects supported games to Battle.net services. An mfil file contains settings used by this client and its update process.
This is an internal settings file rather than a document intended for direct use. Its presence and contents depend on the Battle.net client and the associated game installation.
mfil files are used internally by the Battle.net client and are not intended to be opened manually. The Battle.net client reads them as needed when managing supported Blizzard games and their updates.
Do not edit or rename an mfil file. Use the Battle.net client to manage the related game and its settings.
An mfil file is an internal Battle.net settings file with no user-facing conversion procedure. Its contents are intended to be read by the Battle.net client rather than converted to another format.
Software apps that manage or store settings in mfil files:
Microsoft Windows
Multiplatform
Software applications that handle other tasks involving mfil files:
Multiplatform
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