Guide
Why can a QR code still work with a logo in the middle?
Error correction gives QR codes some recovery room, but the room is not unlimited. Keep the logo small, protect key patterns, and test at the real size.
A logo really does cover part of the code
The reason this can work is QR error correction. Some missing or damaged modules can be reconstructed. That is useful, but it is not a license to cover half the symbol.
The three big corner patterns matter a lot
Those finder patterns help a camera locate and orient the QR code. Keep logos, frames, and decorative elements away from them.
Smaller print makes everything less forgiving
A code that scans perfectly on a monitor can fail on a small flyer. Module size, blur, contrast, and lighting all become more important.
Auto-check is useful; a real phone is still the final test
Generate, scan it back in the browser, then test the actual printed or displayed version on more than one device if the QR matters.
Treat scanning as part of the design process
Do not finish the artwork and scan once at the very end. Scan after the logo, after the color change, and again at the final physical size.
That makes it obvious which design change reduced the safety margin.