Scanning opens the website.
Four things that ruin most printed codes. We see them at client sites every week, so they are collected here.
A camera finds the code by the empty frame around it. Dropped straight onto a photo or a coloured background, it stops being found. The dashed line in the preview shows exactly how much space is left.
Rule of thumb: the code should be at least a tenth as wide as the distance it will be scanned from. On a poster read from three metres, that is thirty centimetres.
Cameras read dark and light, not hues. A yellow code on white looks fine on screen and never scans. That is why the tool stops you when the two colours sit too close together.
A PNG is a grid of dots: enlarged past the size it was saved at, the edges blur and scanning gets unreliable. SVG scales with no loss at all.
The code is built inside your browser. WiFi passwords, phone numbers and business card details are never sent anywhere and never stored. Once the page has loaded you can go offline — it keeps working.