HRX
From Just Solve the File Format Problem
HRX (Human Readable Archive) is a simple non-compressed archive format designed for storing text files. It is apparently associated with Google.
The specification seems to imply that it can only store files that are valid UTF-8.
Identification
An HRX file starts with '<
', then one or more '=
' characters, then '>
', then either a space (0x20
) or newline (0x0a
).