QR Code Generator
Generate QR codes for URLs, WiFi, contacts and more.
How to qr code generator
- Choose the content type — URL, WiFi, contact card or plain text.
- Fill in the content. The QR code updates live.
- Adjust size, colours and error correction, then download as SVG or PNG.
About this tool
QR codes are a 1994 technology that became genuinely ubiquitous around 2020. The error-correction mechanism — Reed-Solomon codes at four possible levels — is what makes them work in the real world, where a printed code might be partially obstructed or a screen-displayed code might be at an angle. Level M at 15% error correction means a scanner can still read the code if 15% of it is obscured.
The logo-in-the-centre pattern works by intentionally obscuring part of the code and relying on that error correction to recover the missing data. That is why you should use Q or H level when adding a logo — L and M do not leave enough redundancy. The quiet zone (the white margin around the code) is not decorative: the scanner algorithm looks for the distinctive position markers at the corners and uses the margin to identify where the code starts.