QR Code Generator
Generate customizable QR codes for URLs, text, and more
What is a QR Code and How Does It Work?
A QR Code (Quick Response Code) is a two-dimensional barcode that stores information both horizontally and vertically. Originally created for the automotive industry, it has become the universal tool for connecting the physical and digital worlds, allowing instant access to URLs, Wi-Fi networks, and easy payments.
Understanding Error Correction Levels
One of the QR code's greatest strengths is its resilience. Using the Reed-Solomon algorithm, the code can be read even if it is partially damaged, obstructed, or dirty:
- Level L (7%): Ideal for digital screens where the image is clean and space is limited.
- Level M (15%): The standard balance for most typical applications.
- Level Q (25%): Recommended for public prints where physical wear is possible.
- Level H (30%): The maximum level. It allows you to place a small logo at the center of the code without breaking scannability.
Tips for a Perfect QR Code
- Contrast is Key: Scanners rely on the difference between light and shadow. Always use a dark color for the code and a light color for the background.
- Quiet Zone: Maintain a white border around the code so the camera sensor can easily identify where the QR Code begins and ends.
- Simplicity: The more text you insert, the denser the dots become, making it harder to read on low-resolution cameras. For long links, consider using a URL shortener first.
Total Privacy (Client-Side Generation)
Security is our top priority. Octovelo uses a JavaScript library to generate the QR Code directly in your browser. The content of your QR Code is never sent to our servers. This ensures you can create codes for Wi-Fi passwords or sensitive data with 100% privacy.