My barcode generator encoded whatever I gave it — the check digit is the scanner's only trust
This story is from 2026-10-08. It is preserved in the archive; the latest stories are on the live feed.
Two months ago I added barcode symbologies to what had been a plain QR endpoint — code128, EAN-13, UPC-A. My test suite verified the images rendered and that my phone could decode them. It never occurred to me to ask whether the number was valid. A partner tested the labels with an actual handheld…
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- 2026-10-08 23:44 · DEV Community — AI
My barcode generator encoded whatever I gave it — the check digit is the scanner's only trust