User:ArrowHead294/UTF-8 extensions - Revision history

ArrowHead294 at 18:39, 23 February 2026

2026-02-23T18:39:30Z

← Older revision		Revision as of 18:39, 23 February 2026
Line 1:		Line 1:
			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 {{nowrap\|2<sup>31</sup> − 1}} = 0x7FFFFFFF without using <code>FE</code> and <code>FF</code>.

	{\| class="wikitable"		{\| class="wikitable"
	\|+ style="font-size: 105%;" \| Code point ↔ UTF-8 conversion		\|+ style="font-size: 105%;" \| Code point ↔ UTF-8 conversion

ArrowHead294 at 04:47, 7 February 2026

2026-02-07T04:47:01Z

← Older revision		Revision as of 04:47, 7 February 2026
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	\|+ style="font-size: 105%;" \| Code point ↔ UTF-8 conversion		\|+ style="font-size: 105%;" \| Code point ↔ UTF-8 conversion
	\|-		\|-
	! colspan="2" \| Code point		! colspan="2" style="border-right: 4px solid black;" \| Code point
	! colspan="6" \| Bytes		! colspan="6" style="border-right: 4px solid black;" \| Bytes
	! colspan="2" \| Eight-byte UTF-8		! colspan="2" \| Eight-byte UTF-8
	\|-		\|-
	! First		! First
	! Last		! style="border-right: 4px solid black;" \| Last
	! 1		! 1
	! 2		! 2
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	! 4		! 4
	! 5		! 5
	! 6		! style="border-right: 4px solid black;" \| 6
	! First		! First
	! Last		! Last
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+0000}}		\| style="text-align: right;" \| {{plaincode\|U+0000}}
	\| style="text-align: right;" \| {{plaincode\|U+007F}}		\| style="border-right: 4px solid black; text-align: right;" \| {{plaincode\|U+007F}}
	\| {{plaincode\|0''yyyzzzz''}}		\| {{plaincode\|0''yyyzzzz''}}
	\| colspan="5" style="background: darkgray;" \|		\| colspan="5" style="background: darkgray; border-right: 4px solid black;" \|
	\| {{plaincode\|00}}		\| {{plaincode\|00}}
	\| {{plaincode\|7F}}		\| {{plaincode\|7F}}
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+0080}}		\| style="text-align: right;" \| {{plaincode\|U+0080}}<br />{{plaincode\|U+0400}}
	\| style="text-align: right;" \| {{plaincode\|U+07FF}}		\| style="border-right: 4px solid black; text-align: right;" \| {{plaincode\|U+03FF}}<br />{{plaincode\|U+07FF}}
	\| {{plaincode\|110''xxxyy''}}		\| {{plaincode\|110''xxxyy''}}
	\| {{plaincode\|10''yyzzzz''}}		\| {{plaincode\|10''yyzzzz''}}
	\| colspan="4" style="background: darkgray;" \|		\| colspan="4" style="background: darkgray; border-right: 4px solid black;" \|
	\| {{plaincode\|C2 80}}		\| {{plaincode\|C2 80}}<br />{{plaincode\|D0 80}}
	\| {{plaincode\|DF BF}}		\| {{plaincode\|CF BF}}<br />{{plaincode\|DF BF}}
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+0800}}		\| style="text-align: right;" \| {{plaincode\|U+0800}}
	\| style="text-align: right;" \| {{plaincode\|U+FFFF}}		\| style="border-right: 4px solid black; text-align: right;" \| {{plaincode\|U+FFFF}}
	\| {{plaincode\|1110''wwww''}}		\| {{plaincode\|1110''wwww''}}
	\| {{plaincode\|10''xxxxyy''}}		\| {{plaincode\|10''xxxxyy''}}
	\| {{plaincode\|10''yyzzzz''}}		\| {{plaincode\|10''yyzzzz''}}
	\| colspan="3" style="background: darkgray;" \|		\| colspan="3" style="background: darkgray; border-right: 4px solid black;" \|
	\| {{plaincode\|E0 A0 80}}		\| {{plaincode\|E0 A0 80}}
	\| {{plaincode\|EF BF BF}}		\| {{plaincode\|EF BF BF}}
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+010000}}<br />{{plaincode\|U+110000}}		\| style="text-align: right;" \| {{plaincode\|U+010000}}<br />{{plaincode\|U+110000}}
	\| style="text-align: right;" \| {{plaincode\|U+10FFFF}}<br />{{plaincode\|U+1FFFFF}}		\| style="border-right: 4px solid black; text-align: right;" \| {{plaincode\|U+10FFFF}}<br />{{plaincode\|U+1FFFFF}}
	\| {{plaincode\|11110''uvv''}}		\| {{plaincode\|11110''uvv''}}
	\| {{plaincode\|10''vvwwww''}}		\| {{plaincode\|10''vvwwww''}}
	\| {{plaincode\|10''xxxxyy''}}		\| {{plaincode\|10''xxxxyy''}}
	\| {{plaincode\|10''yyzzzz''}}		\| {{plaincode\|10''yyzzzz''}}
	\| colspan="2" style="background: darkgray;" \|		\| colspan="2" style="background: darkgray; border-right: 4px solid black;" \|
	\| {{plaincode\|F0 90 80 80}}<br />{{plaincode\|F4 90 80 80}}		\| {{plaincode\|F0 90 80 80}}<br />{{plaincode\|F4 90 80 80}}
	\| {{plaincode\|F4 8F BF BF}}<br />{{plaincode\|F7 BF BF BF}}		\| {{plaincode\|F4 8F BF BF}}<br />{{plaincode\|F7 BF BF BF}}
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+200000}}		\| style="text-align: right;" \| {{plaincode\|U+200000}}
	\| style="text-align: right;" \| {{plaincode\|U+3FFFFFF}}		\| style="border-right: 4px solid black; text-align: right;" \| {{plaincode\|U+3FFFFFF}}
	\| {{plaincode\|111110''tt''}}		\| {{plaincode\|111110''tt''}}
	\| {{plaincode\|10''uuuuvv''}}		\| {{plaincode\|10''uuuuvv''}}
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	\| {{plaincode\|10''xxxxyy''}}		\| {{plaincode\|10''xxxxyy''}}
	\| {{plaincode\|10''yyzzzz''}}		\| {{plaincode\|10''yyzzzz''}}
	\| style="background: darkgray;" \|		\| style="background: darkgray; border-right: 4px solid black;" \|
	\| {{plaincode\|F8 88 80 80 80}}		\| {{plaincode\|F8 88 80 80 80}}
	\| {{plaincode\|FB BF BF BF BF}}		\| {{plaincode\|FB BF BF BF BF}}
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+4000000}}		\| style="text-align: right;" \| {{plaincode\|U+4000000}}
	\| style="text-align: right;" \| {{plaincode\|U+7FFFFFFF}}		\| style="border-right: 4px solid black; text-align: right;" \| {{plaincode\|U+7FFFFFFF}}
	\| {{plaincode\|1111110''s''}}		\| {{plaincode\|1111110''s''}}
	\| {{plaincode\|10''sstttt''}}		\| {{plaincode\|10''sstttt''}}
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	\| {{plaincode\|10''vvwwww''}}		\| {{plaincode\|10''vvwwww''}}
	\| {{plaincode\|10''xxxxyy''}}		\| {{plaincode\|10''xxxxyy''}}
	\| {{plaincode\|10''yyzzzz''}}		\| style="border-right: 4px solid black;" \| {{plaincode\|10''yyzzzz''}}
	\| {{plaincode\|FC 84 80 80 80 80}}		\| {{plaincode\|FC 84 80 80 80 80}}
	\| {{plaincode\|FD BF BF BF BF BF}}		\| {{plaincode\|FD BF BF BF BF BF}}
	\|}		\|}

ArrowHead294 at 04:38, 7 February 2026

2026-02-07T04:38:40Z

← Older revision		Revision as of 04:38, 7 February 2026
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	\| {{plaincode\|EF BF BF}}		\| {{plaincode\|EF BF BF}}
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+010000}}		\| style="text-align: right;" \| {{plaincode\|U+010000}}<br />{{plaincode\|U+110000}}
	\| style="text-align: right;" \| {{plaincode\|U+1FFFFF}}		\| style="text-align: right;" \| {{plaincode\|U+10FFFF}}<br />{{plaincode\|U+1FFFFF}}
	\| {{plaincode\|11110''uvv''}}		\| {{plaincode\|11110''uvv''}}
	\| {{plaincode\|10''vvwwww''}}		\| {{plaincode\|10''vvwwww''}}
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	\| {{plaincode\|10''yyzzzz''}}		\| {{plaincode\|10''yyzzzz''}}
	\| colspan="2" style="background: darkgray;" \|		\| colspan="2" style="background: darkgray;" \|
	\| {{plaincode\|F0 90 80 80}}		\| {{plaincode\|F0 90 80 80}}<br />{{plaincode\|F4 90 80 80}}
	\| {{plaincode\|F7 BF BF BF}}		\| {{plaincode\|F4 8F BF BF}}<br />{{plaincode\|F7 BF BF BF}}
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+200000}}		\| style="text-align: right;" \| {{plaincode\|U+200000}}

ArrowHead294 at 04:27, 7 February 2026

2026-02-07T04:27:18Z

← Older revision		Revision as of 04:27, 7 February 2026
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	\| {{plaincode\|7F}}		\| {{plaincode\|7F}}
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+0080}}~~<br />C2 80~~		\| style="text-align: right;" \| {{plaincode\|U+0080}}
	\| style="text-align: right;" \| {{plaincode\|U+07FF}}~~<br />DF BF~~		\| style="text-align: right;" \| {{plaincode\|U+07FF}}
	\| {{plaincode\|110''xxxyy''}}		\| {{plaincode\|110''xxxyy''}}
	\| {{plaincode\|10''yyzzzz''}}		\| {{plaincode\|10''yyzzzz''}}

ArrowHead294 at 04:24, 7 February 2026

2026-02-07T04:24:50Z

← Older revision		Revision as of 04:24, 7 February 2026
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	! colspan="2" \| Code point		! colspan="2" \| Code point
	! colspan="6" \| Bytes		! colspan="6" \| Bytes
			! colspan="2" \| Eight-byte UTF-8
	\|-		\|-
	! First		! First
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	! 5		! 5
	! 6		! 6
			! First
			! Last
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+0000}}		\| style="text-align: right;" \| {{plaincode\|U+0000}}
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	\| {{plaincode\|0''yyyzzzz''}}		\| {{plaincode\|0''yyyzzzz''}}
	\| colspan="5" style="background: darkgray;" \|		\| colspan="5" style="background: darkgray;" \|
			\| {{plaincode\|00}}
			\| {{plaincode\|7F}}
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+0080}}		\| style="text-align: right;" \| {{plaincode\|U+0080}}<br />C2 80
	\| style="text-align: right;" \| {{plaincode\|U+07FF}}		\| style="text-align: right;" \| {{plaincode\|U+07FF}}<br />DF BF
	\| {{plaincode\|110''xxxyy''}}		\| {{plaincode\|110''xxxyy''}}
	\| {{plaincode\|10''yyzzzz''}}		\| {{plaincode\|10''yyzzzz''}}
	\| colspan="4" style="background: darkgray;" \|		\| colspan="4" style="background: darkgray;" \|
			\| {{plaincode\|C2 80}}
			\| {{plaincode\|DF BF}}
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+0800}}		\| style="text-align: right;" \| {{plaincode\|U+0800}}
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	\| {{plaincode\|10''yyzzzz''}}		\| {{plaincode\|10''yyzzzz''}}
	\| colspan="3" style="background: darkgray;" \|		\| colspan="3" style="background: darkgray;" \|
			\| {{plaincode\|E0 A0 80}}
			\| {{plaincode\|EF BF BF}}
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+010000}}		\| style="text-align: right;" \| {{plaincode\|U+010000}}
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	\| {{plaincode\|10''yyzzzz''}}		\| {{plaincode\|10''yyzzzz''}}
	\| colspan="2" style="background: darkgray;" \|		\| colspan="2" style="background: darkgray;" \|
			\| {{plaincode\|F0 90 80 80}}
			\| {{plaincode\|F7 BF BF BF}}
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+200000}}		\| style="text-align: right;" \| {{plaincode\|U+200000}}
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	\| {{plaincode\|10''yyzzzz''}}		\| {{plaincode\|10''yyzzzz''}}
	\| style="background: darkgray;" \|		\| style="background: darkgray;" \|
			\| {{plaincode\|F8 88 80 80 80}}
			\| {{plaincode\|FB BF BF BF BF}}
	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+4000000}}		\| style="text-align: right;" \| {{plaincode\|U+4000000}}
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	\| {{plaincode\|10''xxxxyy''}}		\| {{plaincode\|10''xxxxyy''}}
	\| {{plaincode\|10''yyzzzz''}}		\| {{plaincode\|10''yyzzzz''}}
			\| {{plaincode\|FC 84 80 80 80 80}}
			\| {{plaincode\|FD BF BF BF BF BF}}
	\|}		\|}

ArrowHead294 at 04:02, 7 February 2026

2026-02-07T04:02:06Z

← Older revision		Revision as of 04:02, 7 February 2026
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	\|-		\|-
	\| style="text-align: right;" \| {{plaincode\|U+010000}}		\| style="text-align: right;" \| {{plaincode\|U+010000}}
	\| style="text-align: right;" \| {{plaincode\|U+~~10FFFF~~}}		\| style="text-align: right;" \| {{plaincode\|U+1FFFFF}}
	\| {{plaincode\|11110''uvv''}}		\| {{plaincode\|11110''uvv''}}
	\| {{plaincode\|10''vvwwww''}}		\| {{plaincode\|10''vvwwww''}}

ArrowHead294: Created page

2026-02-07T04:01:11Z

Created page

New page

{| class="wikitable"
|+ style="font-size: 105%;" | Code point ↔ UTF-8 conversion
|-
! colspan="2" | Code point
! colspan="6" | Bytes
|-
! First
! Last
! 1
! 2
! 3
! 4
! 5
! 6
|-
| style="text-align: right;" | {{plaincode|U+0000}}
| style="text-align: right;" | {{plaincode|U+007F}}
| {{plaincode|0''yyyzzzz''}}
| colspan="5" style="background: darkgray;" |
|-
| style="text-align: right;" | {{plaincode|U+0080}}
| style="text-align: right;" | {{plaincode|U+07FF}}
| {{plaincode|110''xxxyy''}}
| {{plaincode|10''yyzzzz''}}
| colspan="4" style="background: darkgray;" |
|-
| style="text-align: right;" | {{plaincode|U+0800}}
| style="text-align: right;" | {{plaincode|U+FFFF}}
| {{plaincode|1110''wwww''}}
| {{plaincode|10''xxxxyy''}}
| {{plaincode|10''yyzzzz''}}
| colspan="3" style="background: darkgray;" |
|-
| style="text-align: right;" | {{plaincode|U+010000}}
| style="text-align: right;" | {{plaincode|U+10FFFF}}
| {{plaincode|11110''uvv''}}
| {{plaincode|10''vvwwww''}}
| {{plaincode|10''xxxxyy''}}
| {{plaincode|10''yyzzzz''}}
| colspan="2" style="background: darkgray;" |
|-
| style="text-align: right;" | {{plaincode|U+200000}}
| style="text-align: right;" | {{plaincode|U+3FFFFFF}}
| {{plaincode|111110''tt''}}
| {{plaincode|10''uuuuvv''}}
| {{plaincode|10''vvwwww''}}
| {{plaincode|10''xxxxyy''}}
| {{plaincode|10''yyzzzz''}}
| style="background: darkgray;" |
|-
| style="text-align: right;" | {{plaincode|U+4000000}}
| style="text-align: right;" | {{plaincode|U+7FFFFFFF}}
| {{plaincode|1111110''s''}}
| {{plaincode|10''sstttt''}}
| {{plaincode|10''uuuuvv''}}
| {{plaincode|10''vvwwww''}}
| {{plaincode|10''xxxxyy''}}
| {{plaincode|10''yyzzzz''}}
|}