How to Create a QR Code
1. Choose what the QR code should open
Start with the final content, not the visual design. For a website, copy the exact address and open it yourself first. For Wi-Fi or contact details, verify every field before generating the code.
2. Generate the QR code
Use a generator that supports the content type you need. Keep the code visually simple. Decorative changes are acceptable only if the finished code remains easy for phone cameras to recognise.
3. Test before you publish
Scan the code using more than one phone and, where possible, more than one camera app. Confirm that the destination loads correctly and that the page works on mobile.
Common QR-code use cases
Website link
Use the final HTTPS URL you want people to visit. Avoid a temporary redirect owned by a third party if you cannot control where it goes later.
Wi-Fi access
When your QR generator supports Wi-Fi data, check the network name and password carefully before sharing the code.
Print and signage
Use strong contrast, keep clear space around the code, and test the actual printed version from the distance people will scan it.
Security and trust
Before scanning or publishing a QR code, make the destination clear. A QR code can hide a harmful link just as a normal hyperlink can, so users should know what they are opening.
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Source & methodology
DENSO WAVE documents QR Code construction requirements; the FTC covers malicious links hidden in QR codes.