GUIDE深度 · Deep dive
QR Code Use Cases and Formats
A QR code just encodes a string into modules. What happens on scan depends on the content format: a URL, WIFI: config, BEGIN:VCARD contact or mailto: link. Static codes never expire; dynamic codes depend on a short-link service and break if it stops.
Static: content is in the code, works offline and never expires.
Dynamic: points to a short link, editable and measurable, but depends on the service.
Wi-Fi: WIFI:T:WPA;S:ssid;P:password;;
vCard: BEGIN:VCARD...END:VCARD
Email: mailto:you@example.com?subject=Hi
FAQ
Can a static QR track scans?
Not directly; use a dynamic short link or landing page for analytics.
Does a Wi-Fi QR expose the password?
Yes, anyone who scans gets it; do not post a guest Wi-Fi code publicly.