What Is a QR Code?
A QR (quick response) code is a two-dimensional barcode made of black and white squares that stores information such as a web address, text, contact details, or Wi-Fi credentials. It was invented in 1994 by Denso Wave and can be read by most smartphone cameras.
Error Correction
QR codes include error correction, so they can still be read if part of the code is damaged or covered. Higher error correction levels allow more damage but store less data.
Static vs. Dynamic
A static QR code stores its content directly; a dynamic code points to a redirect that can be changed later.
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🔗 Related Terms
More Everyday Tools Terms
- Aspect Ratio
- Binary Number
- Currency Denomination
- Data Storage Units (KB, MB, GB, TB)
- Exchange Rate
- Hexadecimal
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Last updated: September 27, 2026. This definition is for general educational purposes only. It is not financial, investment, tax, legal, or medical advice, and it does not recommend any product or course of action. For decisions about your own situation, consult a qualified professional.