Free Tools
Free QR Code Tools
Helpful tools to create perfect QR codes. Calculate sizes, check contrast, decode existing codes, and more.
Size Calculator
Calculate the perfect QR code size for any scanning distance. Get minimum and recommended dimensions for business cards, posters, and signage.
Contrast Checker
Check if your QR code colors have sufficient contrast for reliable scanning. Prevent codes that won't scan.
QR Code Reader
Upload a QR code image and decode its contents. Verify your codes work before printing.