About qr code generator
A QR code is a square barcode that a phone camera reads to open a link, show text or share contact details. This guide covers how to make one that scans reliably, whether it goes on a poster, a menu or a business card.
Static codes and what they contain
The codes made here are static: the link or text is stored directly in the pattern. They never expire and need no account, but they cannot be edited later. If the destination might change, point the code at a short page you control rather than printing a long, final URL.
Making a code that scans
- Keep strong contrast. Dark dots on a light background scan best; light dots on a dark background fail on many readers.
- Leave a blank margin around the code, about four modules wide.
- Shorter content makes a simpler, more robust pattern. Long text creates a dense code that needs a larger print size.
- If you add a logo, keep it small so the code stays readable.
Choosing a size and format
PNG suits screens, documents and messaging. SVG is a vector format that stays sharp at any size, which makes it the better choice for banners and printing. As a rough rule, print a code at least 2 cm wide and test it with two or three different phones before you print a large batch.
