What I Learned About Barcode Specs After 12 Years in Amazon Warehouses

Short summary

An Amazon warehouse veteran shares 12 years of barcode standards expertise: Code 128 for shipping, EAN-13 for retail (13-digit, GS1-prefixed), ITF-14 for corrugated FBA cases with thick bearer bars. Critical lesson: barcodes require whitespace margin; label designers cropping to the edge cause scanner rejections. Built genbarcode.org, a client-side Canvas tool generating six formats.

• •Barcode formats have specific use cases: Code 128 (high-density alphanumeric), EAN-13 (global retail, GS1 prefixed), ITF-14 (corrugated-safe FBA)
• •Failure mode: insufficient whitespace margin causes label rejections at scale
• •Author built genbarcode.org as client-side barcode generator based on real warehouse operations

Generated with AI, which can make mistakes.