How to convert an ISBN to a barcode.

ISBN vs. barcode: they’re not the same thing

An ISBN is a number. A barcode is a picture of that number a scanner can read. The barcode on the back of a printed book is an EAN-13 symbol — the same format used on most retail products — encoding your 13-digit ISBN.

Bookstores and point-of-sale systems don’t read the printed digits under the barcode; they scan the lines. That’s why having the ISBN alone isn’t enough once you’re printing for retail. You need the barcode image itself, sized and formatted for print.

(Don’t have an ISBN yet, or not sure you need one? See Do You Need an ISBN for a Chapbook? first.)

What you need before you start

• Your ISBN, entered exactly as issued — dashes and all. Bowker and most agencies issue it hyphenated, something like 978-1-234567-89-0.
• Your list price, optionally, if you want it encoded (more below).
• Nothing else. No Illustrator, no Photoshop, no barcode font.

Step by step: convert your ISBN to a barcode, free

1. Open the free ISBN barcode generator.
2. Enter your ISBN exactly as issued, dashes included. The tool encodes your actual number as a proper EAN-13 symbol, not a generic placeholder, so it scans correctly at checkout.
3. Add a price block or caption if you want one.
4. Generate it. You get a real, scannable PNG at 3 inches wide, free, no watermark.
5. Drop it into your cover file at the size it was generated, or buy the premium package if you need it bigger or in a print-shop format (next section).

That’s the whole process. No account, no email required for the free version, nothing to install.

Should you add a price to the barcode?

You can encode your cover price as a 5-digit add-on — 01895 for $18.95, say — printed alongside the main symbol. It’s standard on trade paperbacks sold through bookstores, since it lets a register ring up the price without a lookup, but plenty of self-published books skip it. If your price might change later, leave it off; you’re not required to encode one.

When the free version isn’t enough

The free PNG is a real, scannable barcode, not a preview — it’s just fixed at 3 inches wide. Fine for a lot of covers, wrong for some print workflows. If your printer needs something more specific, look for:

• Vector files (EPS/PDF) — for a cover laid out in InDesign or Illustrator and sent to a professional press.
• Other sizes — most print specs call for something between 2 and 8 inches wide depending on trim size.
• Higher-resolution raster files — 600 dpi PNG or 300 dpi JPG if your printer wants a flattened image instead of vector art.

The barcode generator’s $10 one-time package covers all of that — vector EPS/PDF, PNG and JPG in seven widths, a placement guide, and the ability to update your price or caption later without starting over. Flat fee once, not a subscription.

One thing this won’t do

It converts an ISBN you already have into a barcode. It doesn’t assign you a new ISBN — for that you buy one from your country’s agency (Bowker in the U.S.) first, then come back and generate the barcode from it.

And if you’re publishing exclusively through Amazon KDP, you can skip this whole page: KDP generates its own barcode automatically. This matters when you’re printing through a different press, IngramSpark, or a local print shop and have to supply your own print-ready file.