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UTF-8

UTF-8 is a character encoding standard used for electronic communication. Defined by the Unicode Standard, the name is derived from Unicode Transformation Format – 8-bit. As of 2026, almost every webpage (99%) is transmitted as UTF-8.

Standards & History

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Classification
Unicode Transformation Format, extended ASCII, variable-length encoding
Extends
ASCII
Preceded by
UTF-1
Standard
Unicode Standard
Transforms / Encodes
ISO/IEC 10646 (Unicode)

Topics to explore

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Overview

History

Description

Comparison to UTF-16

Implementations and adoption

Standards

Advanced semantic analysis

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Map overview Semantic statistics

UTF-8

Nodes130
Edges129
Triples107
Avg. degree1.98
Density0.015385
Components1

How this topic connects Entity context

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UTF-8

Top relations

related to Implementations and adoption · 21
UTF-8 → Although, As, ASCII, BOM, Consortium, DOM, HTML, Internet Mail Consortium, January, JSON, Living Standard, Many, The World Wide Web, Unicode, Using, Version, Virtually, W3C HTML, WHATWG, World Wide Web
related to Standards · 20
UTF-8 → AL32UTF8means UTF-8, ASCII, BOM, CESU-8, CSS, HTML, HTTP, In, In HP PCL, In MySQL, In Oracle Database, In Windows, Internet Assigned Numbers Authority, Many, Some, Symbol-ID, The, Unicode Consortium, Web, XML
related to Comparison to UTF-16 · 12
UTF-8 → FFFF, For, In, May, Qt, Some, The, This, Unicode, UTF-16, Windows, Windows API
related to Surrogates · 12
UTF-8 → BMP, CESU-8, D800, DFFF, November, Since RFC, These, This, Unicode, UTF-16, Windows, WTF-8
related to Byte-order mark · 9
UTF-8 → ASCII, BOM, FEFF, If, Nevertheless, The Unicode Standard, Unicode, Unicode Standard, While ASCII
related to External links · 7
UTF-8 → Bell LabsHistory, Original UTF-8, Plan, Rob PikeCharacters, Symbols, Unicode Miracle, YouTube
related to Description · 3
UTF-8 → As, In, Unicode
is a · 2
UTF-8 → character encoding standard used for electronic communication, prefix code and it is unnecessary to read past the last byte of a code point to decode it
Classification · 1
UTF-8 → Unicode Transformation Format, extended ASCII, variable-length encoding
Extends · 1
UTF-8 → ASCII

Important terminology Word statistics

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Important terminology

encoding unicode code bytes byte utf-16 ascii character characters file used using points standard use also encodings error string text

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
UTF-8ClassificationUnicode Transformation Format, extended ASCII, variable-length encoding1.00infobox
UTF-8ExtendsASCII1.00infobox
UTF-8Preceded byUTF-11.00infobox
UTF-8StandardUnicode Standard1.00infobox
UTF-8Transforms / EncodesISO/IEC 10646 (Unicode)1.00infobox
UTF-8is acharacter encoding standard used for electronic communication0.90text
UTF-8is aprefix code and it is unnecessary to read past the last byte of a code point to decode it0.90text
Latin-1 in older RFCs.Earlier standards for UTF-8instance ofreplacing Single Byte Character Sets0.80text
like .mw-parser-output cite.citationinstance ofreplacing Single Byte Character Sets0.80text
Shift-JISinstance ofUnlike many earlier multi-byte text encodings0.80text
it is self-synchronizing so searches for short strings or characters are possibleinstance ofUnlike many earlier multi-byte text encodings0.80text
Microsoft's IIS web serverinstance ofThere have been numerous high-profile vulnerabilities involving overlong encodings reported in products0.80text

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