.BRFNA File Extension
Nintendo Wii Font File
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What is a BRFNA file?
A BRFNA file is a font file used by a Nintendo Wii or Nintendo 3DS video game. It contains data used to display in-game text. BRFNA files are not meant to be opened.
Similar to how Windows and Mac PCs use .OTF and .TTF files to store, retrieve, and show fonts, Nintendo Wii and 3DS video games use BRFNA files to store, retrieve, and show fonts. While some enterprising video game modders have managed to open and modify these files, in attempts to translate a video game's text into another language, BRFNA files are not meant to be opened.
How to open a BRFNA file
BRFNA files are not meant to be opened. However, Wii and 3DS modders claim they have been able to open and modify BRFNA files using the Nintendo Wii Software Development Kit (SDK).
Also, you can convert BRFNA files with the NW4R_fontcvtr program on a Wii and the NW4F_FontConverter on a Wii U.