Having a barcode number is only half the job — you also need a clean, scannable image. Here’s how to generate one correctly.
Match the symbology to your number
A 12-digit number is encoded as UPC-A; a 13-digit number as EAN-13. Using the wrong symbology produces an invalid image.
Always verify the encoded number matches your assigned GTIN exactly.
Respect quiet zones and size
Barcodes need blank margins (quiet zones) on the left and right to scan. Don’t crop them tight or place text right against the bars.
Keep enough resolution for print — vector or 300+ DPI PNG avoids blurry, unscannable bars.
Test before you print
Scan the generated image with a phone app to confirm it reads back the correct number.
A quick validation step now saves rejected listings and reprints later.
Frequently Asked Questions
What format should a barcode image be?
High-resolution PNG or a vector format, with proper quiet-zone margins.
Why won’t my barcode scan?
Usually it’s cropped quiet zones, low resolution, or the wrong symbology.
Can I get the image with my number?
Yes — GoodUPC provides a ready, scannable image with every barcode number.
Need genuine barcodes? Get ready-to-use UPC & EAN numbers with images at GoodUPC.