A QR Code (Quick Response Code) is a type of two-dimensional barcode that can store a large amount of data compared to traditional barcodes. It was invented in 1994 by the Japanese company Denso Wave, primarily for use in the automotive industry. Over time, it has become widely used in various industries for its versatility.
Key Features of QR Codes
- Structure:
- Made up of black and white square patterns.
- Can store numeric, alphanumeric, binary, or special characters.
- Data Capacity:
- Numeric: Up to 7,089 characters.
- Alphanumeric: Up to 4,296 characters.
- Binary (8-bit): Up to 2,953 bytes.
- Kanji/Kana: Up to 1,817 characters.
- Error Correction:
- Uses Reed-Solomon error correction, allowing QR codes to be read even if partially damaged.
- Scannable:
- Can be scanned quickly using a smartphone, tablet, or dedicated QR scanner.
- Dynamic and Static Codes:
- Static QR Code: The data is embedded directly and cannot be changed after creation.
- Dynamic QR Code: Links to a URL or server, allowing content to be updated without changing the QR code.
Uses of QR Codes
- Marketing and Advertising – Direct users to websites, product pages, or promotional offers.
- Payments – Used for mobile payments like Google Pay, Paytm, and other digital wallets.
- Authentication – Login verification, like WhatsApp Web linking.
- Event Management – Tickets, passes, and registration.
- Product Information – Direct users to detailed product specifications or manuals.
- Healthcare – Store patient information or medication details.
- Business Cards – Share contact information via vCard.
How to Create and Use a QR Code
- Create:
- Use a QR code generator to input data like URLs, text, or numbers.
- You can customize it with colors, logos, and designs for branding.
- Scan:
- Open a QR scanner app or use the built-in camera of most smartphones.
- Point the camera at the QR code to scan and access its content.
Advantages of QR Codes
- Fast and easy to scan.
- Versatile: Supports a variety of data types.
- Compact: Stores large amounts of data in a small space.
- Error Tolerant: Can still work if partially damaged.
To generate QR codes use https://qr.ontoolkit.in/
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