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Barcode EAN8

Tool to generate / decode EAN-8 barcodes. The EAN8 code (European Article Numbering 8) is a barcode standard used for commercial products.

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Barcode EAN8 -

Tag(s) : Character Encoding, Image Processing

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# Barcode EAN8

## Barcode EAN-8 Generator

 Checksum Add the control character Already included in the coded value Ignore (no control)
 Output format Image Binary Data 0=Empty and 1=Black bar Checksum value

### Options

 Output format Value/Text of the Barcode Image

### How to encrypt using Barcode EAN8 cipher?

The EAN-8 Barcode format is a subcategory of EAN barcodes from which it incorporates some characteristics. It allows coding only 8-digit numbers (from 0 to 9) using 7-bit binary codes displayed in these two correspondence tables:

DigitLeftRight
000011011110010
100110011100110
200100111101100
301111011000010
401000111011100
501100011001110
601011111010000
701110111000100
801101111001000
900010111110100

To code the first 4 digits, use the binary codes left and for the next 4 digits, use the binary codes right.

A complete EAN8 barcode starts and ends with a normal guard zone that is coded 101 and also contains a central guard zone that is coded 01010 and which separates the first 4 digits of the next 4.

Example: The number 12341234 is coded in EAN-8 (0 = empty and 1 = black bar):

 || 1 2 3 4 || 1 2 3 4 || 101 0011001 0010011 0111101 0100011 01010 1011100 1000010 1101100 1100110 101

The 8th digit of the EAN-8 barcode is a checksum.

### How to decrypt a Barcode EAN8?

The decryption of the EAN8 Code is done by binary reading of vertical bars (with black = 1 and white = 0), which can then be translated via the coding table (above).

### How to calculate the EAN8 checksum?

The checksum is calculated with weights (3 and 1) associated with the first 7 digits of the bar code. The 8th digit (control character) is the digit $x$ such as the total sum modulo 10 is equal to 0.

Example: 1234567 has for sum $1\times3+2\times1+3\times3+4\times1+5\times3+6\times1+7\times3=60$ and $60 + X \equiv 0 \mod 10 \iff x = 0$ so the check digit is 0

### How to recognize an EAN8 Barcode?

The EAN8 barcode has a graphical form of classic barcode, with generally 3 double bars a little longer located at the beginning, in the middle and at the end.

An EAN8 barcode is made to code only 8-digit numbers and so fits for small objects.

The binary representation of the EAN-8 (noted with 0 or B for black bars and 1 or W for white bars) has a fixed length of 67 bits. It begins and ends with 101 and never includes more than 4 consecutive identical bits.

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Barcode EAN8 on dCode.fr [online website], retrieved on 2023-09-21, https://www.dcode.fr/barcode-ean8

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