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What is a QR code? A clear guide to how QR codes work, their anatomy, error correction, types, and the quishing security risks you should know in 2026.

Static vs dynamic QR codes, explained without the sales pitch: real differences, when each wins, and the truth about "free" dynamic codes.

QR code best practices, sourced from ISO/IEC 18004: contrast, quiet zone, the 10:1 size rule, logos, testing, CTAs and tracking. No invented stats.

A practical guide to print marketing QR codes: static vs dynamic, how to track print campaigns with UTMs, print specs, and when to skip QR codes.

Learn how to create a QR code for free in 6 steps: add a logo, pick PNG or SVG, size it for print, and know when you need a dynamic code.

The best free QR code generator for 2026, ranked honestly: no-signup picks, what never expires, and where each tool's "free" really stops.