BCFNT File

What are BCFNT files and how to open them

Are you having problems opening a BCFNT file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your BCFNT files.

What is a BCFNT file?

A .BCFNT file is a Nintendo 3DS Bitmap Font Format file.

Nintendo 3DS bitmap fonts in the Binary Citrus Font format store the graphics and layout data needed to render text on the 3DS handheld system. These files package glyph imagery, spacing metrics, character-to-glyph mapping tables, and font metadata for use by the 3DS operating system and games.

They are produced using Nintendo's NW4C library (the 3DS' native font toolkit) during development or as part of the system firmware. Once built, these files are read by the 3DS graphics engine, which uses texture sheets of glyphs and lookup tables in CMAP and CWDH blocks to draw font characters.

Technical identifiers include a four-byte magic header "CFNT" at offset 0, followed by other blocks such as FINF (font info), TGLP (texture glyph layout), CWDH (character widths), and CMAP (character mapping). These block signatures help tools recognize the file format.

How to open BCFNT files

Important: Different programs may use files with the BCFNT file extension for different purposes, so unless you are sure which format your BCFNT file is, you may need to try a few different programs.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Last updated: August 23, 2026

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