In-depth guides on barcode formats, QR codes, Shopify, Amazon FBA, hardware and more — all free.
The most-asked question by new sellers — what's the difference between EAN-13 and UPC-A, which one Amazon requires, and how to convert between them. Includes a country prefix reference table and GS1 pricing breakdown.
Read GuideFNSKU, shipping, suffocation warning, expiry date, bundle labels — exact sizes, DPI requirements and print tips.
FNSKU, UPC, EAN-13, GTIN exemptions — what's required, what's optional, and the mistakes that get shipments rejected.
FNSKU, UPC, EAN — exact dimensions, placement rules, print quality requirements and the 7 most common mistakes that get shipments rejected.
Read GuideBeyond the basic digital menu — WiFi sharing, Google review requests, loyalty sign-ups, behind-the-scenes content and more. All free, no subscription needed.
Read GuideWhen a free barcode is enough — and when you need to register with GS1. Includes a simple numbering system for your catalog.
Honest comparison of paid Shopify apps vs free web tools. Most small stores never need to pay — find out why.
URL, WiFi, vCard, Google reviews — 8 practical use cases, completely free.
Clear, practical breakdown — data capacity, who reads each, when to use both, and a full comparison table.
When you need a registered EAN-13 — and how to apply. Includes pricing table for US, UK and Germany.
How it works, what the 13 digits mean, GS1 country prefixes, check digit explained — everything in one place.
A complete breakdown of all common formats and the right choice for each industry.
Industry-specific format recommendations and practical tips for your business sector.
Error correction levels, color tips and best practices for creating effective QR codes.
Auto check digit, PNG + SVG + PDF download. No signup required.
Any text or number. Perfect for FNSKU, shipping labels and inventory.
For US and Canadian retail. Auto check digit, PNG + SVG download.
URL, WiFi, vCard, email, location — 7 types. Add logo, download PNG or SVG.
Guests scan and connect instantly. No password typing needed.
Turn any link into a QR code. Never expires, no redirect service.
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Wireless, USB and handheld scanners compared. Can your phone replace a dedicated scanner?