QR codes are generated using the QRCode.js library, which encodes your input text or URL into a two-dimensional barcode. The generator automatically selects the appropriate QR version based on input length, uses Level H error correction for maximum durability, and renders the result at your chosen pixel size. The code is created entirely in your browser with no server transmission.
Larger codes (250-300px) are better for printed materials. Smaller codes (100-150px) work fine for digital displays. Minimum readable size depends on scanner distance and print quality.
This generator uses standard black-on-white QR codes for maximum compatibility and scannability across all devices and lighting conditions.
QR codes can store up to 4,296 characters of text or 2,953 bytes of binary data. The generator automatically selects the appropriate version for your input.
No. All QR code generation happens entirely in your browser. Your text or URL is never transmitted to any external server.
Estimate only. Results reflect your inputs and standard formulas. Double-check important decisions independently.