Question 1

What is Code 128 and when should I use it?

Accepted Answer

Code 128 is a high-density linear barcode that can encode all 128 ASCII characters. It is widely used in logistics, shipping, and inventory management. Use Code 128 when your data contains letters and numbers (alphanumeric). For retail products, use EAN-13 or EAN-8 instead.

Question 2

What is EAN-13 and how is the check digit calculated?

Accepted Answer

EAN-13 (European Article Number) is a 13-digit barcode used worldwide for retail products. The 13th digit is a check digit calculated from the first 12 digits using an alternating weight of 1 and 3. This tool auto-calculates the check digit — just enter the first 12 digits.

Question 3

What is EAN-8 and when is it used?

Accepted Answer

EAN-8 is a shortened version of EAN-13 for small packages where there is not enough space for a full barcode. It encodes 8 digits (7 data + 1 check digit). EAN-8 codes are assigned by GS1 and typically used for very small consumer products like candy or pencils.

Question 4

Can I use this barcode SVG in print or professional publishing?

Accepted Answer

Yes. SVG (Scalable Vector Graphics) barcodes scale without quality loss at any resolution, making them ideal for print. Download the SVG and open it in Adobe Illustrator, Inkscape, or insert it into a Word/Pages document. For print, ensure quiet zones (white margins) are preserved around the barcode.

Question 5

Why does my EAN-13 barcode show 13 digits when I entered 12?

Accepted Answer

EAN-13 requires 13 digits total. The 13th digit is a checksum that validates the barcode. This tool auto-computes it from your 12-digit input. If you enter all 13 digits, only the first 12 are used for encoding and the 13th is recomputed.

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