Quiet zone is not optional decoration
Cameras need breathing room around the pattern. We have seen beautiful brand guides crop the white border to fit a logo, then wonder why Android scanners hesitate. Keep a clear margin; dark backgrounds need a light mat behind the code, not inverted colors that look cool on Behance.
Generate a test file with our QR Code Generator, then scan from three distances before you approve print. If marketing wants a center logo, keep it small and stick to higher error correction—still test, because “should work” is not data.
Vector exports scale cleanly for print; raster is fine for slides when pixel dimensions match the projector, not the source file’s ego.
Contrast, size, and surface
Low contrast—gray on charcoal, pastel on cream—kills scans faster than wrong URLs. Minimum physical size depends on viewing distance; a poster viewed from six feet needs a bigger module than a tabletop tent. Curved surfaces (cups, bottles) distort; flat stickers on cups beat wrapping the code around the rim.
Screens can work, but glare and refresh flicker matter. Brightness up, blue-light filters off for the test. I have watched event codes fail because someone displayed them on a cracked protector with fingerprints—real world, not lab conditions.
Add a short human-readable URL under the code for accessibility and for guests whose camera app failed at the worst moment.
Shorter URLs survive better
Dense QR modules come from long query strings. Use a short canonical link, strip tracking junk when possible, or redirect from a tiny path you control. UTM parameters belong in the redirect target, not always in the encoded string you print forever.
HTTPS is assumed; mixed-content landing pages annoy users who scan from corporate Wi‑Fi. Preview the destination on mobile before batch export—desktop-only menus are a common fail after a successful scan.
UTM clutter belongs in redirects when possible; encode the shortest stable path you control, not every campaign parameter you might dream up later.
Launch checklist
Test iOS and Android, light and dim room, print proof if physical. Archive the SVG or PNG you used so reprints match. Track broken-link reports separately from scan analytics if you can.
We keep the generator linked in marketing handoffs so “just export from the design tool” does not become “nobody knows which URL was encoded.” Boring discipline beats expensive reprints every time.
Event staff should carry a backup QR at a different size—if one fails under venue lights, you learn why before the crowd does.