Author
Brian McKinley
President of Left Foot Software, which he founded in 2008. Brian wrote the Left Foot Software guides on Shopify barcodes, GTINs and labels.
About Brian
Brian McKinley founded Left Foot Software in 2008 and is its President. He builds order, inventory and warehouse management software for footwear and apparel wholesalers, and the company’s Shopify apps for barcodes and labels, GS1 Assistant and Label Wizard. Before Left Foot Software, he was Chief Architect at Motek, a warehouse management software company. His specialities are warehouse systems, US retailer compliance for footwear distribution, and database design and system architecture.
The guides on this blog come from that work. Read more about the company or see the Shopify apps.
Guides by Brian
- SKU vs UPC vs GTIN vs Barcode: What’s the Difference on Shopify?
- Why Shopify Barcode Labels Cut Off Long Product Names, and How to Print Them in Full
- GS1 Sunrise 2027 and 2D Barcodes: What Changes for Your Shopify Store (and What Doesn’t)
- How to Print Sale Labels in Shopify That Show the Compare-at Price
- Leaving Shopify’s Retail Barcode Labels App? Keep Your Barcodes When You Switch
- How to Print Barcode Labels for Shopify Variants (Free App)
- Shopify GTIN Errors in Google Merchant Center: Wrong Number, or No Number?
- From GTIN to Label: How to Print GS1 Barcode Labels for Your Shopify Products
- How to Bulk-Assign GTINs (UPC/EAN) to Shopify Variants Without Doing It One Product at a Time
- Avery Label Templates for Shopify Product Barcodes: Which Size to Use
- GS1 Company Prefix: What It Is, How to Get One, and Shopify Setup (2026)
- 9 Best Shopify Barcode Label Apps, Ranked for 2026
- 8 Best Shopify Barcode & GTIN Apps in 2026 (Free & Paid)
Questions about GS1 Assistant or Label Wizard?
Talk with our team, or see what each Shopify app does.