.BCSV File Extension

Regular CSV files contain comma-delimited plain text data sets that can be used as a database or spreadsheet data. BCSV files are CSV files that have been converted to a binary format so they can be included in Nintendo video games.

For example, Animal Crossing: New Horizons contains BCSV files that, among other things, control how often animals appear. While many games use BCSV files, all BCSV files are not formatted the same. Thus, a utility that can open one game's BCSV files may not be able to open other games'.

Modders have created utilities that allow them to open and edit some games' BCSV files. For example, you can edit Animal Crossing: New Horizons BCSV files with ACNH BCSV Reader (Windows), and you can edit Super Mario Galaxy BCSV files with Whitehole (multiplatform).