How to Print a QR Code So It Actually Scans
How do you print a QR code so it scans? It worked on your screen, then 5,000 flyers came back and half the phones can't read them. Here's what changes on paper.
Start with the file: vector formats (SVG, PDF, EPS) stay sharp at any size, while a PNG needs enough pixels at the final print size, and 300 DPI is a common minimum. Then the ink: solid 100% black instead of grey tints that print as dots, why four-ink black can land out of line, and how ink spread makes small modules run together. Then the surface: gloss glare, folds and seams, bottles, fabric, and engraved codes that rely on light and shadow. Finally, print one proof at real size and scan it on several phones before the batch.
It scanned perfectly on your screen.
Then you printed 5,000 flyers and half the phones can't read them.
So how do you print a QR code so it scans?
Start with the file.
Vector files like SVG, PDF, or EPS are drawn from shapes.
Scale them up and the edges stay sharp.
A PNG is made of pixels.
Stretch a small one and every edge goes soft.
So if you use a PNG, export it at the final print size.
300 dpi is a common minimum.
Size still follows episode 5, about one-tenth of the scanning distance.
And the quiet zone from episode 4 stays inside the trim, so the cut never eats it.
Next, the ink.
Dark modules on a light background.
Print them in solid black.
A gray tint is printed as tiny dots, and that breaks up the edges.
Black mixed from four inks can land slightly out of line.
So many printers ask for 100% black only.
Ink also spreads into paper.
Small modules can swell and run together, so keep the data short and the modules big.
Then the surface.
Gloss can throw glare straight into the camera.
A matte area behind the code helps.
Keep it off folds and seams.
On a bottle, keep it small against the curve.
Fabric and corrugated card can warp the modules too.
And engraved or embossed codes get their contrast from light and shadow.
So check them in the real light.
Before the big run, print one proof at the real size on the real material.
Scan it with several phones, including an older one at the real distance.
Only then, print the batch.
And for a big run, use a dynamic code, so you can change the link without reprinting.
So, is a PNG good enough for print?
Yes, if it has enough pixels at the final size.
For anything that gets resized, use a vector.
And if you're printing a code anyway, it can look like your brand.
AriaQR turns any image into a QR code that still looks like your image.
Tested on real scanners before you pay.
Make yours at ariaqr.com.
If you're printing a code anyway, it can look like your brand.
