You can create QR codes for URLs, plain text, email addresses, phone numbers, WiFi credentials (auto-connect), and vCards (contact information).

Error correction allows the QR code to be read even if partially damaged. Higher levels (H=30%) allow more damage tolerance but create denser codes. Medium (M=15%) works well for most uses.

PNG is a raster format good for web and print at fixed sizes. SVG is a vector format that scales perfectly to any size without quality loss - ideal for large prints.

Yes! You can change both foreground and background colors. For best scanning, maintain high contrast between them. Avoid light foreground on light background.

Yes, QR codes have capacity limits based on content type and error correction. URL/text can hold about 4,000 characters at low error correction. Keep content concise for best results.