Guide category

QR-code fundamentals

Understand how QR codes store information, recover from damage, and scan reliably.

PNG vs. SVG QR Codes: Which Format Should You Use?

Compare raster PNG and vector SVG QR exports for websites, office documents, professional print layouts, scaling, logos, and security review.

Understand QR error-correction levels, what recovery can and cannot fix, and how to choose a level for clean, damaged, or logo-bearing designs.

Choose QR-code dimensions from module count, scan distance, printing limits, and environment instead of relying on one universal minimum size.

Compare static QR payloads with redirect-based dynamic services, including editing, privacy, cost, reliability, and long-term ownership.

Learn how a QR code turns information into a scannable grid, what its visible patterns do, and what happens after a camera reads it.

Diagnose QR scanning failures caused by payload density, size, contrast, quiet zones, logos, materials, distance, lighting, or destination problems.