Windows-1258

Windows-1258 is a codepage used in Microsoft Windows to represent Vietnamese texts. It makes use of combining diacritical marks. Windows-1258 is not compatible with VISCII. It is very similar to windows-1252 with the differences being that s-caron and z-caron (which were added to windows-1252 later) are missing, four of the letters with diacritics have been replaced by combining diacritics and a few other letter/diacritic combinations have been replaced.

Use of combining diacritics means that windows-1258 can cover the large number of letter/diacritic combinations in Vietnamese without compromising coverage of control codes or symbols.

UTF-8 is the preferred encoding for Vietnamese in modern applications. Windows 1258 may not always round trip Unicode encoded Vietnamese due to Unicode normalization differences.

Codepage layout

The following table shows Windows-1258. Only the upper half (128–255) of the table is shown, the lower half (0–127) being plain ASCII. Each character is shown with its Unicode equivalent and its decimal code. Differences from Windows-1252 are marked with thick green borders.

Windows-1258
	−0	−1	−2	−3	−4	−5	−6	−7	−8	−9	−A	−B	−C	−D	−E	−F
8−	€ 20AC 128		‚ 201A 130	ƒ 0192 131	„ 201E 132	… 2026 133	† 2020 134	‡ 2021 135	ˆ 02C6 136	‰ 2030 137		‹ 2039 139	Œ 0152 140
9−		‘ 2018 145	’ 2019 146	“ 201C 147	” 201D 148	• 2022 149	– 2013 150	— 2014 151	˜ 02DC 152	™ 2122 153		› 203A 155	œ 0153 156			Ÿ 0178 159
A−	NBSP 00A0 160	¡ 00A1 161	¢ 00A2 162	£ 00A3 163	¤ 00A4 164	¥ 00A5 165	¦ 00A6 166	§ 00A7 167	¨ 00A8 168	© 00A9 169	ª 00AA 170	« 00AB 171	¬ 00AC 172	SHY 00AD 173	® 00AE 174	¯ 00AF 175
B−	° 00B0 176	± 00B1 177	² 00B2 178	³ 00B3 179	´ 00B4 180	µ 00B5 181	¶ 00B6 182	· 00B7 183	¸ 00B8 184	¹ 00B9 185	º 00BA 186	» 00BB 187	¼ 00BC 188	½ 00BD 189	¾ 00BE 190	¿ 00BF 191
C−	À 00C0 192	Á 00C1 193	Â 00C2 194	Ă 0102 195	Ä 00C4 196	Å 00C5 197	Æ 00C6 198	Ç 00C7 199	È 00C8 200	É 00C9 201	Ê 00CA 202	Ë 00CB 203	̀ 0300 204	Í 00CD 205	Î 00CE 206	Ï 00CF 207
D−	Đ 0110 208	Ñ 00D1 209	̉ 0309 210	Ó 00D3 211	Ô 00D4 212	Ơ 01A0 213	Ö 00D6 214	× 00D7 215	Ø 00D8 216	Ù 00D9 217	Ú 00DA 218	Û 00DB 219	Ü 00DC 220	Ư 01AF 221	̃ 0303 222	ß 00DF 223
E−	à 00E0 224	á 00E1 225	â 00E2 226	ă 0103 227	ä 00E4 228	å 00E5 229	æ 00E6 230	ç 00E7 231	è 00E8 232	é 00E9 233	ê 00EA 234	ë 00EB 235	́ 0301 236	í 00ED 237	î 00EE 238	ï 00EF 239
F−	đ 0111 240	ñ 00F1 241	̣ 0323 242	ó 00F3 243	ô 00F4 244	ơ 01A1 245	ö 00F6 246	÷ 00F7 247	ø 00F8 248	ù 00F9 249	ú 00FA 250	û 00FB 251	ü 00FC 252	ư 01B0 253	₫ 20AB 254	ÿ 00FF 255

External links

• Windows 1258 reference chart
• IANA Charset Name Registration of windows-1258
• Unicode mapping table for Windows 1258
• Unicode mappings of windows 1258 with "best fit"
• Michael Kaplan's blog describing the Windows 1258 encoding behavior