RapidCRC is an open source CRC/MD5/SHA hashing program. This is a mod of the original RapidCRC . The current unicode support was extended to allow writing of unicode .sfv/.md5/.sha1/.sha256/.sha512 files, which can be turned on/off through the settings page. Unicode sfv files are written as UTF-16LE with BOM or UTF-8 (with or without BOM), and RCRC performs a codepage detection.