How it works
The QR code holds your text directly, so it never expires and doesn't depend on any website. WhatsApp codes open a chat with your number (use the country code, such as 92 for Pakistan, without the first 0). Wi-Fi codes let people join your network by scanning.
Keep a strong contrast between colour and background, and use high error correction if you will place a logo on top.
Frequently asked questions
Do these QR codes expire?
No. The information is inside the code itself, so it works for as long as the printed code is readable.
How big should I print a QR code?
At least 2 × 2 cm for close scanning, and bigger for posters read from a distance: about one tenth of the scanning distance.
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