What Is a QR Code?
A QR Code is a two-dimensional symbol that stores data in a pattern of modules and can be read by a compatible camera or scanner.
A QR Code is a two-dimensional symbol that stores information in a grid of light and dark modules. A camera or scanner reads the pattern, converts it into data, and offers the appropriate action, such as opening a URL, showing text, or saving contact information.
DENSO WAVE developed QR Code for fast reading from different directions. Its specification was later standardized as ISO/IEC 18004. QR Codes also support error correction, allowing some data to be recovered when a symbol is slightly dirty or damaged. Successful recovery still depends on the damage, print size, contrast, and camera quality.
Common Uses
- Connecting posters or packaging to a digital page
- Opening a menu, form, ticket, or event resource
- Sharing a digital business card and contact details
- Sending an audience to a short link or microsite
How to Keep a QR Code Scannable
- Use strong contrast between the modules and background
- Leave an empty quiet zone around the symbol
- Avoid printing it too small
- Do not cover the position patterns in three corners
- Test it on several devices before mass printing
A QR Code only carries the data its creator puts inside. Users should still check unfamiliar destinations before opening them. For printed material whose destination may change, a dynamic QR Code lets the owner manage the target without replacing the printed design.
References
Related Terms
What Is a Dynamic QR Code?
A dynamic QR Code uses an intermediary URL so its destination can be managed after printing. Compare it with static QR Codes and analytics.
What Is a Static QR Code?
A static QR Code stores its final data directly in the symbol. Understand its benefits, limitations, and when to choose one.
What Is a QR Code Quiet Zone?
The quiet zone is the empty margin around a QR Code that helps scanners separate the symbol from surrounding artwork. Learn the practical rule.
