Question 1

What can I encode in a QR code?

Accepted Answer

URLs, plain text, WiFi credentials (SSID/password), vCards (contact info), email addresses, phone numbers, SMS messages, and geographic coordinates. The content type is determined by the data format.

Question 2

What size should my QR code be?

Accepted Answer

Minimum 2×2 cm for close-range scanning (business cards). 10×10 cm for posters at arm's length. For billboards, at least 30×30 cm. Always test scanning at the intended distance before printing.

Question 3

Do QR codes expire?

Accepted Answer

Static QR codes (encoding data directly) never expire. Dynamic QR codes (encoding a redirect URL) work as long as the redirect service is active. Use static codes for permanent applications.

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