dLSoft  barcode & labelling software     

Linear barcodes

1. Check overall appearance and any text under barcode. In particular look for elongated bars at the centre and ends of the symbol (characteristic of EAN/JAN/UPC barcodes)

2. Look closely at your barcode and estimate the number of different thickness bars present. In many cases this is 2, although it may be 3 or 4. Compare the number with the values in the table.

3. look at the first few and last few bars of your barcode and compare them with the patterns listed below, where
W=wide bar, N=narrow bar, w=wide space, n=narrow space

For further information on any barcode type click on the image below.

Codabar

Codabar barcode

Number of widths 3, but 2 is common
Start often WnN but 8 possible choices!
Stop often NnW but 8 possible choices
Digits plus $ ; . + /
Start/stop may be A B C D E N T *


Code 11

Code 11 barcode 

Number of widths 3
Start NnWwN
Stop NnWwN
Digits and -


Code 39

Code 39 barcode

Number of widths 2
Start NwNnWnWnN
Stop NwNnWnWnN
Digits and upper case letters and space - . $ % + /


Code 93

Code 93 barcode

Number of widths 3
Start  NnNnW(4)
Stop NnWnN(4)
Digits and upper case letters and space - . $ % + / ( )


Code B

Code B barcode

Number of widths 2
Start  NnNnNnW
Stop NnNnNnNnN
 Digits only


Code 128

Code 128 barcode

Number of widths 4
Start  W(2)nN
Stop W(2)w(3)W(3)nNnW(2)
 Any. GS1-128 are similar, but readable
text generally contains brackets.


EAN14

EAN 14 barcode

Number of widths 4
Start  W(2)nNn(2)W(3)
Stop W(2)n(3)W(3)nNnW(2)
 Digits only with (01) or (02) prefix


EAN-13

EAN 13 barcode

Number of widths 3
Start NnN
Stop NnN
13 Digits only
JAN is similar


UPC-A

UPC-A barcode

Number of widths 3
Start NnN
Stop NnN
12 Digits only


EAN-8

EAN-8 barcode

Number of widths 3
Start NnN
Stop NnN
8 Digits only


UPC-E

UPC-E barcode

Number of widths 3
Start NnN
Stop NnNnN
7 Digits only
(plus a leading 0)


Standard 2 of 5

Standard 2 of 5 barcode

Number of widths 2
Start  WnWnN
Stop WnNnW
Digits only


IATA 2 of 5

IATA 2 of 5

Number of widths 2
Start  NnN
Stop WnN
Digits only


Interleaved 2 of 5

Interleaved 2 of 5 barcode

Number of widths 2
Start  NnN
Stop WnN
Digits only


ITF-14

ITF-14 barcode

Number of widths 2
Start  NnN
Stop WnN
14 Digits only


ITF-6

ITF 6 barcode  

Number of widths 2
Start  NnN
Stop WnN
6 Digits only


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