My EAN-13 barcodes rendered flawlessly and every retail scanner rejected them — the check digit isn't decoration
This story is from 2026-10-03. It is preserved in the archive; the latest stories are on the live feed.
First real complaint about my barcode tool came from someone printing product labels for a shop. The EAN-13s came out visually perfect — crisp bars, correct proportions, human-readable digits underneath. Her handheld scanner buzzed on every single one and refused to read. Root cause: I was encoding…
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- 2026-10-03 11:32 · DEV Community — AI
My EAN-13 barcodes rendered flawlessly and every retail scanner rejected them — the check digit isn't decoration