QR Code Generator

QR (Quick Response) codes are two-dimensional barcodes that can store various types of information, from simple text and URLs to complex data like contact information and WiFi credentials. Originally developed for tracking automotive parts, QR codes have become ubiquitous in marketing, payments, and information sharing due to their versatility and ease of use.

How QR Codes Work

QR codes use a matrix of black and white squares to encode data. The pattern includes finder patterns (the large squares in three corners), timing patterns, and data modules that contain the actual information. Error correction codes are embedded to ensure the QR code remains readable even if partially damaged or obscured, making them highly reliable for real-world use.

Error Correction Levels

QR codes support four levels of error correction: Low (7%), Medium (15%), Quartile (25%), and High (30%). Higher error correction levels allow the code to remain functional even when more of it is damaged, but they also require more space, resulting in denser patterns. Choose higher levels for codes that might be printed on curved surfaces, exposed to weather, or partially covered by logos.

Best Practices for QR Codes

For optimal scanning, ensure sufficient contrast between foreground and background colors, maintain adequate quiet zones (white space) around the code, and test the code at the intended size and distance. Avoid overly complex URLs or excessive data that might create dense, hard-to-scan patterns. Consider the scanning environment - outdoor codes need higher error correction and larger sizes than indoor applications.

Common Use Cases

QR codes excel in bridging physical and digital experiences. Use them for restaurant menus, event check-ins, product information, social media links, WiFi sharing, contact information exchange, and mobile payments. They're particularly valuable in situations where typing long URLs or information would be inconvenient, such as on business cards, posters, or product packaging.

Privacy and Security

Our QR code generator operates entirely in your browser - no data is transmitted to external servers. The generated codes contain only the information you provide, and the generation process uses standard QR code specifications. However, be cautious when scanning QR codes from unknown sources, as they can contain malicious URLs or trigger unwanted actions on your device.