Ethan Caldwell
Editor & QR / Barcode Specialist at QR Barcode Maker
Ethan Caldwell leads editorial at QR Barcode Maker. He has spent over a decade working at the intersection of retail operations and product labeling — from setting up barcode systems for independent shops to helping e-commerce sellers get their GTINs right for Amazon and Shopify.
He writes practical, jargon-free guides on QR codes, 1D barcodes, GS1/GTIN standards, bulk generation workflows, and the print specs that decide whether a code actually scans in the real world. His goal is simple: help a small-business owner or marketer get a working code in minutes, without the upsells and paywalls that clutter most "free" tools.
Areas of Focus
- QR code design, branding, and error-correction trade-offs
- Retail barcodes: EAN-13, UPC-A, Code 128, ITF-14, and GS1 compliance
- Bulk and batch generation from CSV/Excel for events and catalogs
- Print quality, quiet zones, and scanner reliability