QR Code Generator

Error correction allows QR codes to still work even if they're partially damaged or obscured. Higher levels (H) can recover from up to 30% damage but create denser codes. Lower levels (L) create simpler codes but are less resilient to damage.

For print materials, use at least 2cm x 2cm (0.8" x 0.8") for business cards, and larger for posters or signage. The rule is: the further the scanning distance, the larger the QR code should be. Always test scanning from your intended distance.

QR codes themselves never expire - they're just encoded data. However, if your QR code points to a URL, that website might go offline or change. For WiFi and contact QR codes, they'll work as long as the information remains valid.

Use your smartphone's camera app or any QR code scanner to test the code on your screen before printing. Try scanning from different angles and distances. Make sure the code scans reliably and leads to the correct destination.

PNG is best for web use and digital displays. SVG is vector-based and perfect for scaling to any size without quality loss - ideal for professional printing. PDF is great for including in documents or presentations.

Yes, but ensure good contrast between foreground and background colors. Dark colors on light backgrounds work best. Avoid light colors on dark backgrounds as some scanners may have trouble reading them. Always test your custom colored codes.

Our bulk generation feature can handle hundreds of URLs at once. Simply paste one URL per line in the bulk generation section, and we'll create a ZIP file with all your QR codes. Perfect for product catalogs or event management.