Free QR Code Generator

Minimum size depends on content complexity and scanning distance. For close scanning (phone camera), 2-3cm works for simple URLs. More data requires larger codes. Always test actual printed size.

Yes, use high error correction (level H) which allows up to 30% of the code to be obscured. Place the logo in the center. Keep it small (under 20% coverage) and test thoroughly.

Level M (15%) for most uses. Level H (30%) if adding logos or for harsh environments. Level L (7%) only if size is critical and code will be pristine.

Common issues: too small for the data, insufficient contrast between colors, damage or obstruction, too much customization, or camera/app issues. Test with multiple devices.

Version 40 QR codes can hold about 3,000 alphanumeric characters or 4,300 numeric digits. Practical limits are lower for reliable scanning. Keep content concise.

SVG for print (scales perfectly to any size) or web use where you need crisp display. PNG for quick use, presentations, and when SVG is not supported.