A practical guide to better QR codes

A QR code represents information as a pattern of small modules. Keeping content concise and preserving contrast and clear space helps it work reliably in the real world.

URLs and content length

Website mode accepts http:// and https:// addresses. The scanning device needs connectivity to open the destination. This tool does not check whether the destination exists or is safe. Long tracking URLs create denser patterns, so remove unnecessary parameters before generating when appropriate.

Quiet zones and color

The quiet zone separates the pattern from its surroundings. Keep the default four-module border and do not cover it with text or decorative frames. Use dark modules on a light background. Our 3:1 contrast check is a practical design guardrail, not a certification that a scanner will succeed.

Error correction and output formats

M, Q and H provide different amounts of recovery information for damaged codes. Higher correction can make the same content denser. These percentages are not a safe area to cover with a logo. PNG works well on screens, SVG scales cleanly for print, and PDF provides a ready-to-print page.

Wi-Fi and contacts

Wi-Fi mode encodes network credentials in WIFI format. Anyone receiving the code can read the password, so consider a guest network. Contact mode uses vCard 3.0 and device support for fields varies. Test special characters, non-Latin names and international phone numbers on the intended devices.