Read Time: 5 minutes
What Are QR Codes?
A QR code (Quick Response code) is a two-dimensional barcode, also known as a matrix barcode, that stores information in both vertical and horizontal patterns. This enables QR codes to store considerably more data than traditional linear barcodes.
QR Code Components
- Data Modules: Black and white squares that encode the information
- Position Markers: Three corner squares that provide orientation and positioning
- Alignment Patterns: Smaller squares that allow the scanner to maintain accuracy even when the code is distorted
- Error Correction: Built-in redundancy enabling recovery from up to 30% damage
Data Storage Capacity by Mode
| Mode | Capacity |
|---|---|
| Numeric | 7,089 digits |
| Alphanumeric | 4,296 characters |
| Binary | 2,953 bytes |
| Kanji | Japanese character encoding |
Error Correction Levels
- L (Low): 7% damage recovery
- M (Medium): 15% damage recovery
- Q (Quartile): 25% damage recovery
- H (High): 30% damage recovery
Why Use QR Codes?
- Fast Readability: Rapidly scanned by smartphones and dedicated readers
- Versatile Data Encoding: Supports URLs, text, contact info, WiFi credentials, and more
- Resilience: Built-in error correction for partially damaged codes
- Mobile-Device Accessibility: Easily scanned with any smartphone camera
Advanced QR Code Techniques
Branding with Logos
QR codes can incorporate embedded logos and halftone designs while maintaining scannability, enabling brand integration.
Custom Design
Advanced design approaches allow color customization and shape modifications while preserving functionality.
Interactive QR Generator
This article includes an interactive QR code generator tool with adjustable parameters including content input, error correction level selection, version control, scale multiplier, and custom colors for creating branded QR codes tailored to your needs.