How to Make 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
Web links
Use the final HTTPS address that you control. If the destination changes later, update the page or controlled redirect rather than relying on an unknown third-party service.
Wi-Fi details
Check the network name, security type and password before distributing the code, especially if it will be printed in a shared space.
Leaflets, menus and signs
Keep good contrast and enough clear space around the code. Test the final artwork at its intended size before ordering a large print run.
Security and trust
QR codes can conceal the destination address, so the surrounding design should explain what the code is for. Be cautious with codes added to public signs or stickers if you cannot verify who placed them.
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Source & methodology
DENSO WAVE documents QR Code construction requirements; the NCSC explains practical QR-code security risks.