Small QR Code Generator
Note on terminology: this generates a regular QR code sized and styled to stay reliably scannable when printed small — it doesn't produce the separate "Micro QR" format defined by the ISO standard, which most phone cameras don't read anyway. For real-world small printing (business cards, product labels), a well-configured standard QR code is what you want.
Shorter data scans smaller
A plain URL (especially a shortened one) needs far fewer modules than a full vCard or WiFi payload — encode the shortest data you can for the smallest reliable print size.
Keep the style simple
Square dots, solid colors, and no logo hold up better at small sizes than decorative styles or embedded images.
Rule of thumb for minimum size
Print no smaller than roughly 2×2cm (about the size of a large postage stamp) for reliable scanning at a normal arm's-length distance.