The original Baudot code was invented by 脡melie Baudot in 1870. It was a 5-bit code that became known as the
International Telegraph Alphabet No 1 (ITA1). In 1901, the code was improved by Donald Murray. Murray designed the code
to minimize the wear on the machinery. He assigned the most frequently used symbols and letters to the codes with fewest
punched holes. This led to the International Telegraph Alphabet No 2 (ITA2) standard, which was widely used until
7-bit ASCII codes appeared in 1963.
Convert Baudot Code
Note that you can type in either the text or code area.
Settings
Original Baudot code (ITA1)
Dec
Hex
Bin
Letter
Figure
Comment
0
00
00000
NUL
NUL
Nothing (blank tape)
1
01
00001
A
1
2
02
00010
E
2
3
03
00011
Carriage return (CR)
Carriage return (CR)
4
04
00100
Y
3
5
05
00101
U
4
6
06
00110
I
Reserved
7
07
00111
O
5
8
08
01000
Figures
Space
Switch to figures
9
09
01001
J
6
10
0A
01010
G
7
11
0B
01011
H
+
12
0C
01100
B
8
13
0D
01101
C
9
14
0E
01110
F
Reserved
15
0F
01111
D
0
16
10
10000
Space
Letters
Switch to letters
17
11
10001
Linefeed (LF)
Linefeed (LF)
New line
18
12
10010
X
,
19
13
10011
Z
:
20
14
10100
S
.
21
15
10101
T
Reserved
22
16
10110
W
?
23
17
10111
V
'
24
18
11000
Del
Del
25
19
11001
K
(
26
1A
11010
M
)
27
1B
11011
L
=
28
1C
11100
R
-
29
1D
11101
Q
/
30
1E
11110
N
Reserved
31
1F
11111
P
%
Baudot-Murray code (ITA2)
Dec
Hex
Bin
Letter
Figure
Comment
0
00
00000
NUL
NUL
Nothing (blank tape)
1
01
00001
E
3
2
02
00010
Line Feed (LF)
Line Feed (LF)
New line
3
03
00011
A
-
4
04
00100
Space
Space
5
05
00101
S
'
6
06
00110
I
8
7
07
00111
U
7
8
08
01000
Carriage return (CR)
Carriage return (CR)
9
09
01001
D
Enquiry
10
0A
01010
R
4
11
0B
01011
J
Bell
Ring bell at other end
12
0C
01100
N
,
13
0D
01101
F
!
14
0E
01110
C
:
15
0F
01111
K
(
16
10
10000
T
5
17
11
10001
Z
+
18
12
10010
L
)
19
13
10011
W
2
20
14
10100
H
$
Can also be 拢
21
15
10101
Y
6
22
16
10110
P
0
23
17
10111
Q
1
24
18
11000
O
9
25
19
11001
B
?
26
1A
11010
G
&
Can also be @
27
1B
11011
Figures
Figures
Switch to figures
28
1C
11100
M
.
29
1D
11101
X
/
30
1E
11110
V
;
31
1F
11111
Letters
Letters
Switch to letters
Features
The original inventor of the code was 脡mile Baudot, although the character set was adjusted later.
The term "baud", still used for measuring communications speed, is named after 脡mile Baudot.
The code allows switching between two modes; letters and figures, at any time. It also contains a few control characters such as Line Feed and Carriage Return.
Baudot-Murray code (ITA2) was used frequently until the introduction of ASCII code.
Trivia: The music band Coldplay used Baudot code on the cover image of their album X&Y.
Baudot codes are used occasionally in geocaching mystery caches (puzzle caches), CTFs and logic puzzles.
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