Encode and decode rfc2047 (MIME encoded words)
Encode and decode rfc2231/rfc5987
Check if a given string is ASCII-safe, i.e. consists of ASCII characters (U+0000 to U+007F) only.
Create a regular expression for Unicode variation selectors
Check if a given file (or list of files) is ASCII-safe, i.e. consisting of ASCII characters (U+0000 to U+007F) only.
UNIX CLI that prints lines that contain non-ASCII characters.