File BOM Detector

A File BOM Detector (Byte Order Mark detector) is any tool, script, or utility used to check if a text file contains a Byte Order Mark.

A BOM is a special, often invisible Unicode character placed at the very beginning of a file to specify its encoding type and byte order (endianness). Why BOM Detection Matters

While BOMs are helpful for software to automatically detect character sets like UTF-16 or UTF-32, they frequently cause major issues in modern computing: Viewing or detecting a BOM in a file – Google Groups