Question 1

What is this barcode used for?

Accepted Answer

It is a standard retail barcode used to identify products at point of sale. It encodes a unique product identifier that barcode scanners can read instantly.

Question 2

How is the check digit calculated?

Accepted Answer

The check digit uses the standard weighted-sum algorithm: each digit is multiplied by alternating weights of 1 and 3, the products are summed, and the check digit rounds the total up to the next multiple of 10.

Question 3

Is this barcode valid for real products?

Accepted Answer

Barcodes generated here have correct structure and check digits, so they will scan. For commercial products you must use GS1-assigned prefixes.

Question 4

Can I print this barcode?

Accepted Answer

Yes. Export as SVG for unlimited resolution or PNG for quick use. Both formats are suitable for printing on labels and packaging.

Question 5

What is ISSN used for?

Accepted Answer

ISSN (International Standard Serial Number) identifies magazines, journals, newspapers, and other serial publications worldwide.

Question 6

How does an ISSN barcode work?

Accepted Answer

An ISSN barcode encodes the 8-digit ISSN plus a 2-digit issue number (add-on). The ISSN itself already includes a check digit.

ISSN Generator

About ISSN Generator

ISSN Generator — FAQ

Ready to Start?