The constructors for the Encoding API interfaces TextDecoder and TextDecoderStream can be passed an optional label, representing the encoding to be used. The default is UTF-8.
The following table lists all encoding names and labels that user agents must support, as defined in the Encoding Spec. These are generally applicable anywhere character encodings are used.
| Label | Encoding |
|---|---|
"unicode-1-1-utf-8", "utf-8", "utf8" | 'utf-8' |
"866", "cp866", "csibm866", "ibm866" | ibm866 |
"csisolatin2", "iso-8859-2", "iso-ir-101", "iso8859-2", "iso88592", "iso_8859-2", "iso_8859-2:1987", "l2", "latin2" | iso-8859-2 |
"csisolatin3", "iso-8859-3", "iso-ir-109", "iso8859-3", "iso88593", "iso_8859-3", "iso_8859-3:1988", "l3", "latin3" | iso-8859-3 |
"csisolatin4", "iso-8859-4", "iso-ir-110", "iso8859-4", "iso88594", "iso_8859-4", "iso_8859-4:1988", "l4", "latin4" | iso-8859-4 |
"csisolatincyrillic", "cyrillic", "iso-8859-5", "iso-ir-144", "iso88595", "iso_8859-5", "iso_8859-5:1988" | iso-8859-5 |
"arabic", "asmo-708", "csiso88596e", "csiso88596i", "csisolatinarabic", "ecma-114", "iso-8859-6", "iso-8859-6-e", "iso-8859-6-i", "iso-ir-127", "iso8859-6", "iso88596", "iso_8859-6", "iso_8859-6:1987" | iso-8859-6 |
"csisolatingreek", "ecma-118", "elot_928", "greek", "greek8", "iso-8859-7", "iso-ir-126", "iso8859-7", "iso88597", "iso_8859-7", "iso_8859-7:1987", "sun_eu_greek" | iso-8859-7 |
"csiso88598e", "csisolatinhebrew", "hebrew", "iso-8859-8", "iso-8859-8-e", "iso-ir-138", "iso8859-8", "iso88598", "iso_8859-8", "iso_8859-8:1988", "visual" | iso-8859-8 |
"csiso88598i", "iso-8859-8-i", "logical" | iso-8859-8i |
"csisolatin6", "iso-8859-10", "iso-ir-157", "iso8859-10", "iso885910", "l6", "latin6" | iso-8859-10 |
"iso-8859-13", "iso8859-13", "iso885913" | iso-8859-13 |
"iso-8859-14", "iso8859-14", "iso885914" | iso-8859-14 |
"csisolatin9", "iso-8859-15", "iso8859-15", "iso885915", "l9", "latin9" | iso-8859-15 |
"iso-8859-16" | iso-8859-16 |
"cskoi8r", "koi", "koi8", "koi8-r", "koi8_r" | koi8-r |
"koi8-u" | koi8-u |
"csmacintosh", "mac", "macintosh", "x-mac-roman" | macintosh |
"dos-874", "iso-8859-11", "iso8859-11", "iso885911", "tis-620", "windows-874" | windows-874 |
"cp1250", "windows-1250", "x-cp1250" | windows-1250 |
"cp1251", "windows-1251", "x-cp1251" | windows-1251 |
"ansi_x3.4-1968", "ascii", "cp1252", "cp819", "csisolatin1", "ibm819", "iso-8859-1", "iso-ir-100", "iso8859-1", "iso88591", "iso_8859-1", "iso_8859-1:1987", "l1", "latin1", "us-ascii", "windows-1252", "x-cp1252" | windows-1252 |
"cp1253", "windows-1253", "x-cp1253" | windows-1253 |
"cp1254", "csisolatin5", "iso-8859-9", "iso-ir-148", "iso8859-9", "iso88599", "iso_8859-9", "iso_8859-9:1989", "l5", "latin5", "windows-1254", "x-cp1254" | windows-1254 |
"cp1255", "windows-1255", "x-cp1255" | windows-1255 |
"cp1256", "windows-1256", "x-cp1256" | windows-1256 |
"cp1257", "windows-1257", "x-cp1257" | windows-1257 |
"cp1258", "windows-1258", "x-cp1258" | windows-1258 |
"x-mac-cyrillic", "x-mac-ukrainian" | x-mac-cyrillic |
"chinese", "csgb2312", "csiso58gb231280", "gb2312", "gb_2312", "gb_2312-80", "gbk", "iso-ir-58", "x-gbk" | gbk |
"gb18030" | gb18030 |
"hz-gb-2312" | hz-gb-2312 |
"big5", "big5-hkscs", "cn-big5", "csbig5", "x-x-big5" | big5 |
"cseucpkdfmtjapanese", "euc-jp", "x-euc-jp" | euc-jp |
"csiso2022jp", "iso-2022-jp" | iso-2022-jp |
"csshiftjis", "ms_kanji", "shift-jis", "shift_jis", "sjis", "windows-31j", "x-sjis" | shift-jis |
"cseuckr", "csksc56011987", "euc-kr", "iso-ir-149", "korean", "ks_c_5601-1987", "ks_c_5601-1989", "ksc5601", "ksc_5601", "windows-949" | euc-kr |
"csiso2022kr", "iso-2022-kr" | iso-2022-kr |
"utf-16be" | utf-16be |
"utf-16", "utf-16le" | utf-16le |
"x-user-defined" | 'x-user-defined' |
"iso-2022-cn", "iso-2022-cn-ext" | 'replacement' |