As character names:
U+0081 <control> character ()
As raw characters:
As a string of HTML entities:

Decoder output:
Byte number 1 is decimal 194, hex 0xC2, octal \302, binary 11000010 This is the first byte of a 2 byte sequence. Byte number 2 is decimal 129, hex 0x81, octal \201, binary 10000001 This is continuation byte 1, expecting 0 more. U+0081 <control>