How to print a QR so it scans well
A QR code is a machine-readable label. Style helps branding, but the matrix still has to survive ink, paper, distance and shaky hands. Before you open the colour picker, decide where the code will live: flyer, table tent, packaging, window or screen.
Write that placement down. It drives minimum size, file format and whether you need a quiet margin that looks “empty” in the layout. Pretty layouts fail when the square is treated as a tiny icon.
Leave a quiet zone around the matrix
Phones look for the three finder patterns in the corners. If text, photos or a coloured frame sit on top of that margin, the camera never locks. Leave a clear border of at least four modules on every side — roughly the width of one of the small squares in the code.
On a busy poster, put the code on a light plate or card so the quiet zone is obvious. Do not crop the SVG tight to the black modules when you place it in design software.
Contrast beats clever colour
Dark modules on a light background remain the safest combination. Soft grey on cream, neon on neon, or white modules on a photo usually fail outdoors or under warm café lighting.
If you brand the code, keep the dark modules near black and the background near white. Test a print under the real light of the venue, not only on a bright monitor.
Size and viewing distance
As a rule of thumb, the short side of the printed code should be at least 2 cm for hand-held scans, and larger if people stand further away. Window stickers and wall posters need a bigger matrix than a business-card corner.
If the code sits behind glass or laminate, increase size and contrast. Reflections and haze reduce the effective resolution the camera sees.
PNG for screens, SVG for print runs
Export PNG when you share in chat or on a website. Export SVG when a designer will scale the mark for print — vectors stay sharp at any size. After export, place the file once and avoid repeated JPEG recompression.
Print one proof, scan with the phones your guests actually use, then print the batch. Fix size or contrast before you order hundreds of stickers.