No. The information is inside the code itself, so it works forever and nothing is tracked. (That also means it cannot be edited after printing.)

How big should I print it?

At least 2 × 2 cm (about 1 inch) for close scanning; bigger for posters seen from a distance. Always test-scan before printing many.

Free QR Code Generator

Choose what the code is for, fill it in and download it.

Colour

Background

Error correctionLogo in the middle

Format Keep transparency

Keep good contrast: a dark code on a light background scans best.

Do the codes expire?: No. The information is inside the code itself, so it works forever and nothing is tracked. (That also means it cannot be edited after printing.)
How big should I print it?: At least 2 × 2 cm (about 1 inch) for close scanning; bigger for posters seen from a distance. Always test-scan before printing many.