Unicode contains 1,114,122 code points, that is characters or non-characters from U+0000 to U+10FFFF.
Currently Quick Unicode Tool only accepts up to 65,536 code points, that is the characters and non-characters from U+0000 to U+FFFF.
This does cover the bulk of the characters currently assigned in Unicode, but increasingly new values are appearing in the higher Unicode planes, and it would be nice if Quick Unicode Tool would handle these higher characters: for example Linear B, Aegean Numbers, Gothic, Musical Symbols, Cuneiform, Mathematical Alphanumeric Symbols, and soon to come, Egyptian hieroglyphics.
I suppose this would mean that Quick Unicode Tool would have to learn to convert these high numbers into the corresponding surrogates. Would that really be too difficult?
