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Barcode 93

Tool to generate/decrypt Barcode 93. Code 93 is a barcode standard for alphanumeric data encoding made for improving barcode 39 using 3 black bands on 9 bits.

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Barcode 93 -

Tag(s) : Character Encoding, Image processing

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Barcode 93

Barcode 93 Generator











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Barcode 93 Reader/Decoder


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See also: Binary Code

Tool to generate/decrypt Barcode 93. Code 93 is a barcode standard for alphanumeric data encoding made for improving barcode 39 using 3 black bands on 9 bits.

Answers to Questions

How to encrypt using Barcode 93 cipher?

Barcode 93 format can encode the same characters as Barcode 39, i.e. 43 characters: 26 capital letters, 10 numbers and 7 special characters (-, ., $, /, + , %, (space) as well as * which is also used to note the beginning and the end of the barcode. However, it uses 4 other special characters noted ($), (/), (+), (%) which are used only in its extended code 93 variant.

Each character is coded on 9 elements and includes 3 black bars (of different thickness). All characters always start with a black band and alternate white and black.

Here is the character mapping table:
0100010100110100100021010001003101000010
4100101000510010010061001000107101010000
81000100109100001010A110101000B110100100
C110100010D110010100E110010010F110001010
G101101000H101100100I101100010J100110100
K100011010L101011000M101001100N101000110
O100101100P100010110Q110110100R110110010
S110101100T110100110U110010110V110011010
W101101100X101100110Y100110110Z100111010
-100101110.111010100111010010$111001010
/101101110+101110110%110101110*101011110
($)100100110(/)111011010(+)111010110(%)100110010

A complete 93 barcode begins with * and ends with 2 control characters followed by a final *.

How to encrypt using Extended ASCII Barcode 93 cipher?

A variant of barcode 93 allows the 128 ASCII values to be coded using the 4 special characters '($) ¹', '(/) ²', '(+) ³', '(%) ⁴' as a prefix.

Code 93ASCII CodeCode 93ASCII CodeCode 93ASCII CodeCode 93ASCII Code
⁴U0¹A1¹B2¹C3
¹D4¹E5¹F6¹G7
¹H8¹I9¹J10¹K11
¹L12¹M13¹N14¹O15
¹P16¹Q17¹R18¹S19
¹T20¹U21¹V22¹W23
¹X24¹Y25¹Z26⁴A27
⁴B28⁴C29⁴D30⁴E31
32²A33²B34²C35
$36%37²F38²G39
²H40²I41²J42+43
²L44-45.46/47
048149250351
452553654755
856957²Z58⁴F59
⁴G60⁴H61⁴I62⁴J63
⁴V64A65B66C67
D68E69F70G71
H72I73J74K75
L76M77N78O79
P80Q81R82S83
T84U85V86W87
X88Y89Z90⁴K91
⁴L92⁴M93⁴N94⁴O95
⁴W96³A97³B98³C99
³D100³E101³F102³G103
³H104³I105³J106³K107
³L108³M109³N110³O111
³P112³Q113³R114³S115
³T116³U117³V118³W119
³X120³Y121³Z122⁴P123
⁴Q124⁴R125⁴S126⁴T127
⁴X127⁴Y127⁴Z127

How to decrypt Barcode 93 cipher?

The decryption of Code 93 consists in the binary reading of the black and white bands (usually via a laser barcode scanner) then in their translation via the coding table.

Example: A message 101011110 100001010 101000010 101011110 translates '* 93 *'

Double checksum is missing in this example

How to calculate the double checksum characters?

Code 93 uses two characters named C and K for the checksum.

Step 1: Associate with each character of the barcode the value of its position in the coding table (starting from 0)

Step 2: Multiply the value found in step 1 by its position in the message starting from the end (starting from 1)

Step 3: Add all the values found and calculate the result modulo 47.

Step 4: Add this character at the end of the barcode.

Do these steps twice, the first time to find C and the second time to find K.

How to recognize 93 Barcode?

Barcode 93 has a classic graphic form (black and white lines) or a binary representation (noted with 1 or B for black bars and 0 or W for white bars).

The barcode can have a variable length. It begins and ends with the character * or 101011110.

Source code

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