$ perl -Mutf8 -CS -wle 'print "réserve"' | uniquote
r\N{U+E9}serve
$ perl -Mutf8 -CS -wle 'print "réserve"' | uniquote -x
r\x{E9}serve
$ perl -Mutf8 -CS -wle 'print "réserve"' | uniquote -v
r\N{LATIN SMALL LETTER E WITH ACUTE}serve
$ perl -Mutf8 -CS -wle 'print "réserve"' | uniquote -b
r\xC3\xA9serve

$ perl -Mutf8 -CS -wle 'print "réserve"' | uniquote --xml
réserve
$ perl -Mutf8 -CS -wle 'print "réserve"' | uniquote --html
réserve
$ perl -Mutf8 -CS -wle 'print "réserve"' | uniquote --html --verbose
réserve

$ perl -Mutf8 -CS -wle 'print "réserve"' | nfd | uniquote -v
re\N{COMBINING ACUTE ACCENT}serve

$ perl -Mutf8 -CS -wle 'print "réserve"' | iconv -f UTF-8 -t UTF-16 | uniquote --encoding=UTF-16 -x
r\x{E9}serve
$ perl -Mutf8 -CS -wle 'print "réserve"' | iconv -f UTF-8 -t UTF-16 | uniquote -b
\xFE\xFF\x00r\x00\xE9\x00s\x00e\x00r\x00v\x00e\x00
$ perl -Mutf8 -CS -wle 'print "réserve"' | iconv -f UTF-8 -t MacRoman | uniquote --encoding=MacRoman -x
r\x{E9}serve
$ perl -Mutf8 -CS -wle 'print "réserve"' | iconv -f UTF-8 -t MacRoman | uniquote -b
r\x8Eserve

$ perl -Mutf8 -CS -wle 'print "réserve"' > reserve.utf8
$ iconv -f UTF-8 -t MacRoman < reserve.utf8 > reserve.macroman
$ iconv -f UTF-8 -t UTF16-BE < reserve.utf8 > reserve.utf16be

$ uniwc reserve.{macroman,utf8,utf16be}
   Paras    Lines    Words   Graphs    Chars    Bytes File
       0        1        1        8        8        8 reserve.macroman
       0        1        1        8        8        9 reserve.utf8
       0        1        1        8        8       16 reserve.utf16be

$ uniquote reserve.{macroman,utf8,utf16be}
r\N{U+E9}serve
r\N{U+E9}serve
r\N{U+E9}serve

$ uniquote -b reserve.{macroman,utf8,utf16be}
r\x8Eserve
r\xC3\xA9serve
\x00r\x00\xE9\x00s\x00e\x00r\x00v\x00e\x00