UnicodeDecoder

KOI8-R vs UTF-8

KOI8-R vs UTF-8

KOI8-R

Legacy

Russian character encoding widely used in Unix systems and early internet. Designed so that stripping the high bit gives readable (if lowercase) ASCII. Still encountered in Russian email and Usenet archives.

IANA Name
KOI8-R
Byte Width
1–1 bytes
Introduced
1993

UTF-8

Unicode

The dominant encoding for the web. Variable-width (1–4 bytes). Fully backwards-compatible with ASCII. The default encoding for HTML5, JSON, and most modern protocols.

IANA Name
UTF-8
Byte Width
1–4 bytes
BOM
EF BB BF
Introduced
1993

KOI8-R Character Set (256 characters)

All characters supported by KOI8-R, with their UTF-8 bytes for comparison. Characters not in the table are supported by Unicode but not KOI8-R.

Char Codepoint Name KOI8-R UTF-8
U+0000 00 00
U+0001 01 01
U+0002 02 02
U+0003 03 03
U+0004 04 04
U+0005 05 05
U+0006 06 06
U+0007 07 07
U+0008 08 08
U+0009 09 09
U+000A 0A 0A
U+000B 0B 0B
U+000C 0C 0C
U+000D 0D 0D
U+000E 0E 0E
U+000F 0F 0F
U+0010 10 10
U+0011 11 11
U+0012 12 12
U+0013 13 13
U+0014 14 14
U+0015 15 15
U+0016 16 16
U+0017 17 17
U+0018 18 18
U+0019 19 19
U+001A 1A 1A
U+001B 1B 1B
U+001C 1C 1C
U+001D 1D 1D
U+001E 1E 1E
U+001F 1F 1F
U+0020 SPACE 20 20
! U+0021 EXCLAMATION MARK 21 21
" U+0022 QUOTATION MARK 22 22
# U+0023 NUMBER SIGN 23 23
$ U+0024 DOLLAR SIGN 24 24
% U+0025 PERCENT SIGN 25 25
& U+0026 AMPERSAND 26 26
' U+0027 APOSTROPHE 27 27
( U+0028 LEFT PARENTHESIS 28 28
) U+0029 RIGHT PARENTHESIS 29 29
* U+002A ASTERISK 2A 2A
+ U+002B PLUS SIGN 2B 2B
, U+002C COMMA 2C 2C
- U+002D HYPHEN-MINUS 2D 2D
. U+002E FULL STOP 2E 2E
/ U+002F SOLIDUS 2F 2F
0 U+0030 DIGIT ZERO 30 30
1 U+0031 DIGIT ONE 31 31
2 U+0032 DIGIT TWO 32 32
3 U+0033 DIGIT THREE 33 33
4 U+0034 DIGIT FOUR 34 34
5 U+0035 DIGIT FIVE 35 35
6 U+0036 DIGIT SIX 36 36
7 U+0037 DIGIT SEVEN 37 37
8 U+0038 DIGIT EIGHT 38 38
9 U+0039 DIGIT NINE 39 39
: U+003A COLON 3A 3A
; U+003B SEMICOLON 3B 3B
< U+003C LESS-THAN SIGN 3C 3C
= U+003D EQUALS SIGN 3D 3D
> U+003E GREATER-THAN SIGN 3E 3E
? U+003F QUESTION MARK 3F 3F
@ U+0040 COMMERCIAL AT 40 40
A U+0041 LATIN CAPITAL LETTER A 41 41
B U+0042 LATIN CAPITAL LETTER B 42 42
C U+0043 LATIN CAPITAL LETTER C 43 43
D U+0044 LATIN CAPITAL LETTER D 44 44
E U+0045 LATIN CAPITAL LETTER E 45 45
F U+0046 LATIN CAPITAL LETTER F 46 46
G U+0047 LATIN CAPITAL LETTER G 47 47
H U+0048 LATIN CAPITAL LETTER H 48 48
I U+0049 LATIN CAPITAL LETTER I 49 49
J U+004A LATIN CAPITAL LETTER J 4A 4A
K U+004B LATIN CAPITAL LETTER K 4B 4B
L U+004C LATIN CAPITAL LETTER L 4C 4C
M U+004D LATIN CAPITAL LETTER M 4D 4D
N U+004E LATIN CAPITAL LETTER N 4E 4E
O U+004F LATIN CAPITAL LETTER O 4F 4F
P U+0050 LATIN CAPITAL LETTER P 50 50
Q U+0051 LATIN CAPITAL LETTER Q 51 51
R U+0052 LATIN CAPITAL LETTER R 52 52
S U+0053 LATIN CAPITAL LETTER S 53 53
T U+0054 LATIN CAPITAL LETTER T 54 54
U U+0055 LATIN CAPITAL LETTER U 55 55
V U+0056 LATIN CAPITAL LETTER V 56 56
W U+0057 LATIN CAPITAL LETTER W 57 57
X U+0058 LATIN CAPITAL LETTER X 58 58
Y U+0059 LATIN CAPITAL LETTER Y 59 59
Z U+005A LATIN CAPITAL LETTER Z 5A 5A
[ U+005B LEFT SQUARE BRACKET 5B 5B
\ U+005C REVERSE SOLIDUS 5C 5C
] U+005D RIGHT SQUARE BRACKET 5D 5D
^ U+005E CIRCUMFLEX ACCENT 5E 5E
_ U+005F LOW LINE 5F 5F
` U+0060 GRAVE ACCENT 60 60
a U+0061 LATIN SMALL LETTER A 61 61
b U+0062 LATIN SMALL LETTER B 62 62
c U+0063 LATIN SMALL LETTER C 63 63
d U+0064 LATIN SMALL LETTER D 64 64
e U+0065 LATIN SMALL LETTER E 65 65
f U+0066 LATIN SMALL LETTER F 66 66
g U+0067 LATIN SMALL LETTER G 67 67
h U+0068 LATIN SMALL LETTER H 68 68
i U+0069 LATIN SMALL LETTER I 69 69
j U+006A LATIN SMALL LETTER J 6A 6A
k U+006B LATIN SMALL LETTER K 6B 6B
l U+006C LATIN SMALL LETTER L 6C 6C
m U+006D LATIN SMALL LETTER M 6D 6D
n U+006E LATIN SMALL LETTER N 6E 6E
o U+006F LATIN SMALL LETTER O 6F 6F
p U+0070 LATIN SMALL LETTER P 70 70
q U+0071 LATIN SMALL LETTER Q 71 71
r U+0072 LATIN SMALL LETTER R 72 72
s U+0073 LATIN SMALL LETTER S 73 73
t U+0074 LATIN SMALL LETTER T 74 74
u U+0075 LATIN SMALL LETTER U 75 75
v U+0076 LATIN SMALL LETTER V 76 76
w U+0077 LATIN SMALL LETTER W 77 77
x U+0078 LATIN SMALL LETTER X 78 78
y U+0079 LATIN SMALL LETTER Y 79 79
z U+007A LATIN SMALL LETTER Z 7A 7A
{ U+007B LEFT CURLY BRACKET 7B 7B
| U+007C VERTICAL LINE 7C 7C
} U+007D RIGHT CURLY BRACKET 7D 7D
~ U+007E TILDE 7E 7E
U+007F 7F 7F
─ U+2500 BOX DRAWINGS LIGHT HORIZONTAL 80 E2 94 80
│ U+2502 BOX DRAWINGS LIGHT VERTICAL 81 E2 94 82
┌ U+250C BOX DRAWINGS LIGHT DOWN AND RIGHT 82 E2 94 8C
┐ U+2510 BOX DRAWINGS LIGHT DOWN AND LEFT 83 E2 94 90
└ U+2514 BOX DRAWINGS LIGHT UP AND RIGHT 84 E2 94 94
┘ U+2518 BOX DRAWINGS LIGHT UP AND LEFT 85 E2 94 98
├ U+251C BOX DRAWINGS LIGHT VERTICAL AND RIGHT 86 E2 94 9C
┤ U+2524 BOX DRAWINGS LIGHT VERTICAL AND LEFT 87 E2 94 A4
┬ U+252C BOX DRAWINGS LIGHT DOWN AND HORIZONTAL 88 E2 94 AC
┴ U+2534 BOX DRAWINGS LIGHT UP AND HORIZONTAL 89 E2 94 B4
┼ U+253C BOX DRAWINGS LIGHT VERTICAL AND HORIZONTAL 8A E2 94 BC
▀ U+2580 UPPER HALF BLOCK 8B E2 96 80
▄ U+2584 LOWER HALF BLOCK 8C E2 96 84
█ U+2588 FULL BLOCK 8D E2 96 88
▌ U+258C LEFT HALF BLOCK 8E E2 96 8C
▐ U+2590 RIGHT HALF BLOCK 8F E2 96 90
░ U+2591 LIGHT SHADE 90 E2 96 91
▒ U+2592 MEDIUM SHADE 91 E2 96 92
▓ U+2593 DARK SHADE 92 E2 96 93
⌠ U+2320 TOP HALF INTEGRAL 93 E2 8C A0
■ U+25A0 BLACK SQUARE 94 E2 96 A0
∙ U+2219 BULLET OPERATOR 95 E2 88 99
√ U+221A SQUARE ROOT 96 E2 88 9A
≈ U+2248 ALMOST EQUAL TO 97 E2 89 88
≤ U+2264 LESS-THAN OR EQUAL TO 98 E2 89 A4
≥ U+2265 GREATER-THAN OR EQUAL TO 99 E2 89 A5
  U+00A0 NO-BREAK SPACE 9A C2 A0
⌡ U+2321 BOTTOM HALF INTEGRAL 9B E2 8C A1
° U+00B0 DEGREE SIGN 9C C2 B0
² U+00B2 SUPERSCRIPT TWO 9D C2 B2
· U+00B7 MIDDLE DOT 9E C2 B7
÷ U+00F7 DIVISION SIGN 9F C3 B7
═ U+2550 BOX DRAWINGS DOUBLE HORIZONTAL A0 E2 95 90
║ U+2551 BOX DRAWINGS DOUBLE VERTICAL A1 E2 95 91
╒ U+2552 BOX DRAWINGS DOWN SINGLE AND RIGHT DOUBLE A2 E2 95 92
ё U+0451 CYRILLIC SMALL LETTER IO A3 D1 91
╓ U+2553 BOX DRAWINGS DOWN DOUBLE AND RIGHT SINGLE A4 E2 95 93
╔ U+2554 BOX DRAWINGS DOUBLE DOWN AND RIGHT A5 E2 95 94
╕ U+2555 BOX DRAWINGS DOWN SINGLE AND LEFT DOUBLE A6 E2 95 95
╖ U+2556 BOX DRAWINGS DOWN DOUBLE AND LEFT SINGLE A7 E2 95 96
╗ U+2557 BOX DRAWINGS DOUBLE DOWN AND LEFT A8 E2 95 97
╘ U+2558 BOX DRAWINGS UP SINGLE AND RIGHT DOUBLE A9 E2 95 98
╙ U+2559 BOX DRAWINGS UP DOUBLE AND RIGHT SINGLE AA E2 95 99
╚ U+255A BOX DRAWINGS DOUBLE UP AND RIGHT AB E2 95 9A
╛ U+255B BOX DRAWINGS UP SINGLE AND LEFT DOUBLE AC E2 95 9B
╜ U+255C BOX DRAWINGS UP DOUBLE AND LEFT SINGLE AD E2 95 9C
╝ U+255D BOX DRAWINGS DOUBLE UP AND LEFT AE E2 95 9D
╞ U+255E BOX DRAWINGS VERTICAL SINGLE AND RIGHT DOUBLE AF E2 95 9E
╟ U+255F BOX DRAWINGS VERTICAL DOUBLE AND RIGHT SINGLE B0 E2 95 9F
╠ U+2560 BOX DRAWINGS DOUBLE VERTICAL AND RIGHT B1 E2 95 A0
╡ U+2561 BOX DRAWINGS VERTICAL SINGLE AND LEFT DOUBLE B2 E2 95 A1
Ё U+0401 CYRILLIC CAPITAL LETTER IO B3 D0 81
╢ U+2562 BOX DRAWINGS VERTICAL DOUBLE AND LEFT SINGLE B4 E2 95 A2
╣ U+2563 BOX DRAWINGS DOUBLE VERTICAL AND LEFT B5 E2 95 A3
╤ U+2564 BOX DRAWINGS DOWN SINGLE AND HORIZONTAL DOUBLE B6 E2 95 A4
╥ U+2565 BOX DRAWINGS DOWN DOUBLE AND HORIZONTAL SINGLE B7 E2 95 A5
╦ U+2566 BOX DRAWINGS DOUBLE DOWN AND HORIZONTAL B8 E2 95 A6
╧ U+2567 BOX DRAWINGS UP SINGLE AND HORIZONTAL DOUBLE B9 E2 95 A7
╨ U+2568 BOX DRAWINGS UP DOUBLE AND HORIZONTAL SINGLE BA E2 95 A8
╩ U+2569 BOX DRAWINGS DOUBLE UP AND HORIZONTAL BB E2 95 A9
╪ U+256A BOX DRAWINGS VERTICAL SINGLE AND HORIZONTAL DOUBLE BC E2 95 AA
╫ U+256B BOX DRAWINGS VERTICAL DOUBLE AND HORIZONTAL SINGLE BD E2 95 AB
╬ U+256C BOX DRAWINGS DOUBLE VERTICAL AND HORIZONTAL BE E2 95 AC
© U+00A9 COPYRIGHT SIGN BF C2 A9
ю U+044E CYRILLIC SMALL LETTER YU C0 D1 8E
а U+0430 CYRILLIC SMALL LETTER A C1 D0 B0
б U+0431 CYRILLIC SMALL LETTER BE C2 D0 B1
ц U+0446 CYRILLIC SMALL LETTER TSE C3 D1 86
д U+0434 CYRILLIC SMALL LETTER DE C4 D0 B4
е U+0435 CYRILLIC SMALL LETTER IE C5 D0 B5
ф U+0444 CYRILLIC SMALL LETTER EF C6 D1 84
г U+0433 CYRILLIC SMALL LETTER GHE C7 D0 B3
х U+0445 CYRILLIC SMALL LETTER HA C8 D1 85
и U+0438 CYRILLIC SMALL LETTER I C9 D0 B8
й U+0439 CYRILLIC SMALL LETTER SHORT I CA D0 B9
к U+043A CYRILLIC SMALL LETTER KA CB D0 BA
л U+043B CYRILLIC SMALL LETTER EL CC D0 BB
м U+043C CYRILLIC SMALL LETTER EM CD D0 BC
н U+043D CYRILLIC SMALL LETTER EN CE D0 BD
о U+043E CYRILLIC SMALL LETTER O CF D0 BE
п U+043F CYRILLIC SMALL LETTER PE D0 D0 BF
я U+044F CYRILLIC SMALL LETTER YA D1 D1 8F
р U+0440 CYRILLIC SMALL LETTER ER D2 D1 80
с U+0441 CYRILLIC SMALL LETTER ES D3 D1 81
т U+0442 CYRILLIC SMALL LETTER TE D4 D1 82
у U+0443 CYRILLIC SMALL LETTER U D5 D1 83
ж U+0436 CYRILLIC SMALL LETTER ZHE D6 D0 B6
в U+0432 CYRILLIC SMALL LETTER VE D7 D0 B2
ь U+044C CYRILLIC SMALL LETTER SOFT SIGN D8 D1 8C
ы U+044B CYRILLIC SMALL LETTER YERU D9 D1 8B
з U+0437 CYRILLIC SMALL LETTER ZE DA D0 B7
ш U+0448 CYRILLIC SMALL LETTER SHA DB D1 88
э U+044D CYRILLIC SMALL LETTER E DC D1 8D
щ U+0449 CYRILLIC SMALL LETTER SHCHA DD D1 89
ч U+0447 CYRILLIC SMALL LETTER CHE DE D1 87
ъ U+044A CYRILLIC SMALL LETTER HARD SIGN DF D1 8A
Ю U+042E CYRILLIC CAPITAL LETTER YU E0 D0 AE
А U+0410 CYRILLIC CAPITAL LETTER A E1 D0 90
Б U+0411 CYRILLIC CAPITAL LETTER BE E2 D0 91
Ц U+0426 CYRILLIC CAPITAL LETTER TSE E3 D0 A6
Д U+0414 CYRILLIC CAPITAL LETTER DE E4 D0 94
Е U+0415 CYRILLIC CAPITAL LETTER IE E5 D0 95
Ф U+0424 CYRILLIC CAPITAL LETTER EF E6 D0 A4
Г U+0413 CYRILLIC CAPITAL LETTER GHE E7 D0 93
Х U+0425 CYRILLIC CAPITAL LETTER HA E8 D0 A5
И U+0418 CYRILLIC CAPITAL LETTER I E9 D0 98
Й U+0419 CYRILLIC CAPITAL LETTER SHORT I EA D0 99
К U+041A CYRILLIC CAPITAL LETTER KA EB D0 9A
Л U+041B CYRILLIC CAPITAL LETTER EL EC D0 9B
М U+041C CYRILLIC CAPITAL LETTER EM ED D0 9C
Н U+041D CYRILLIC CAPITAL LETTER EN EE D0 9D
О U+041E CYRILLIC CAPITAL LETTER O EF D0 9E
П U+041F CYRILLIC CAPITAL LETTER PE F0 D0 9F
Я U+042F CYRILLIC CAPITAL LETTER YA F1 D0 AF
Р U+0420 CYRILLIC CAPITAL LETTER ER F2 D0 A0
С U+0421 CYRILLIC CAPITAL LETTER ES F3 D0 A1
Т U+0422 CYRILLIC CAPITAL LETTER TE F4 D0 A2
У U+0423 CYRILLIC CAPITAL LETTER U F5 D0 A3
Ж U+0416 CYRILLIC CAPITAL LETTER ZHE F6 D0 96
В U+0412 CYRILLIC CAPITAL LETTER VE F7 D0 92
Ь U+042C CYRILLIC CAPITAL LETTER SOFT SIGN F8 D0 AC
Ы U+042B CYRILLIC CAPITAL LETTER YERU F9 D0 AB
З U+0417 CYRILLIC CAPITAL LETTER ZE FA D0 97
Ш U+0428 CYRILLIC CAPITAL LETTER SHA FB D0 A8
Э U+042D CYRILLIC CAPITAL LETTER E FC D0 AD
Щ U+0429 CYRILLIC CAPITAL LETTER SHCHA FD D0 A9
Ч U+0427 CYRILLIC CAPITAL LETTER CHE FE D0 A7
Ъ U+042A CYRILLIC CAPITAL LETTER HARD SIGN FF D0 AA
Other Comparisons
KOI8-R Reference UTF-8 Reference All Encodings Swap comparison →