Scope
Assumptions and limits
QR compatibility depends on scanner software, payload support, size, contrast and print conditions. Always test before distribution.
Results use the values you enter and the conventions described in the methodology below.
Explore business and document tools for related tasks in this collection.
01
How static QR codes work
A scanner decodes the URL, text, Wi-Fi instruction, contact or event stored in the modules. Changing the content requires generating a new code.
02
Quiet zones, contrast and error correction
Keep a clear margin around the code and strong dark-on-light contrast. Higher error correction can tolerate more damage but increases symbol density.
03
Wi-Fi, contact and event payloads
Reserved Wi-Fi characters are escaped. Contacts use vCard 3.0 and events use an iCalendar VEVENT payload for broad compatibility.
04
Privacy and scan testing
Payloads stay in your browser and are excluded from analytics. Test every important code on multiple devices and on the final printed material.
FAQ
Frequently asked questions
Do the QR codes expire?
Does Great Future track scans?
Can I create a Wi-Fi QR code?
PNG or SVG?
Can I change the destination later?
Why will a code not scan?
Sources
Method references and scope
Method: results come from tested code using the documented method and assumptions shown on this page.
Review owner: Great Future Product Engineering.
Method and content last reviewed: . Next review due: .