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What is a QR Code?

QR (Quick Response) code is a type of matrix barcode (or two-dimensional barcode) first designed in 1994 for the automotive industry in Japan. A QR code consists of black squares arranged in a square grid on a white background, which can be read by an imaging device such as a camera. QR codes can store various types of data, including website URLs, phone numbers, text, and more.

Error Correction Levels

QR codes include error correction capability to restore data if the code is damaged or partially obscured. There are four error correction levels:

• Low (7%): Recovers up to 7% of data damage
• Medium (15%): Recovers up to 15% of data damage
• Quartile (25%): Recovers up to 25% of data damage
• High (30%): Recovers up to 30% of data damage

Common Use Cases

• Website URLs: Direct users to your website or specific web pages
• Contact Information: Share contact details or vCards
• Wi-Fi Network Access: Allow users to connect to Wi-Fi without typing credentials
• Payment Information: Share payment details or links to payment services
• Marketing Materials: Add to posters, business cards, or advertisements