User:ArrowHead294/UTF-8 extensions

This is a table illustrating how Unicode code points are converted into UTF-8, specifically, what code points correspond to two-, three-, four-, five-, and six-byte sequences. A break is made in the four-byte sequences as UTF-8 is currently restricted to U+10FFFF to match the constraints of UTF-16, but extensions are shown anyways to show how UTF-8 is capable of encoding up to 2³¹ − 1 = 0x7FFFFFFF without using FE and FF.

Code point ↔ UTF-8 conversion

Code point		Bytes						Eight-byte UTF-8
First	Last	1	2	3	4	5	6	First	Last
U+0000	U+007F	0yyyzzzz						00	7F
U+0080 U+0400	U+03FF U+07FF	110xxxyy	10yyzzzz					C2 80 D0 80	CF BF DF BF
U+0800	U+FFFF	1110wwww	10xxxxyy	10yyzzzz				E0 A0 80	EF BF BF
U+010000 U+110000	U+10FFFF U+1FFFFF	11110uvv	10vvwwww	10xxxxyy	10yyzzzz			F0 90 80 80 F4 90 80 80	F4 8F BF BF F7 BF BF BF
U+200000	U+3FFFFFF	111110tt	10uuuuvv	10vvwwww	10xxxxyy	10yyzzzz		F8 88 80 80 80	FB BF BF BF BF
U+4000000	U+7FFFFFFF	1111110s	10sstttt	10uuuuvv	10vvwwww	10xxxxyy	10yyzzzz	FC 84 80 80 80 80	FD BF BF BF BF BF