What is an ISBN Barcode?

An ISBN is the global ID card for your book. It uses the EAN-13 barcode format with a 978 or 979 prefix. Before 2007, ISBNs were 10 digits; modern books need 13. The check digit at the end is a modulo-10 safeguard that catches scanning errors. For print covers, leave at least 10mm of quiet zone on each side and target 37mm nominal width for reliable retail POS scanning.

FAQ

ISBN-10 vs ISBN-13 — what changed?

ISBN-10 was the pre-2007 10-digit standard. ISBN-13 added the 978/979 prefix to make book barcodes work with global EAN-13 retail scanners everywhere.

Do I need to own an ISBN to use this generator?

Yes. Buy your ISBN from your local agency (Bowker in US, Nielsen in UK). This tool makes the visual barcode from your number — it does not issue ISBNs.

Can I use this for self-published books?

Absolutely. The output meets specs for Amazon KDP, IngramSpark, and traditional offset printing. Thousands of self-published books scan perfectly at Amazon sortation centers with barcodes made this way.

Need other barcode formats? Use the full barcode generator →