A barcode that won’t scan is almost always one of six fixable issues. Here’s the checklist.
Size, margins and contrast
Too small, cropped margins, or low contrast are the top culprits. Keep the barcode near nominal size with clear white space and dark-on-light bars.
These three fix most scan failures.
Resolution and damage
Low-resolution exports produce fuzzy bars; smudges, folds or glare break the read. Print sharp and protect the label.
Re-export at 300+ DPI or vector if bars look blurry.
Wrong symbology
A 12-digit number must be UPC-A, a 13-digit EAN-13. The wrong symbology can render an unreadable or invalid code.
Regenerate with the correct format and scan-test before printing in bulk.
Frequently Asked Questions
Why won’t my barcode scan?
Usually size, margins, contrast, resolution, damage, or wrong symbology.
How do I test a fix?
Scan a printed sample with a phone app.
Does resolution matter?
Yes — print from vector or 300+ DPI.
Need genuine barcodes? Get ready-to-use UPC & EAN numbers with images at GoodUPC.