QR codes guide
QR code best practices
By Waleed Sheeraz, independent operator of A2Z Edit · Updated 2026-09-09
A beautiful poster with an unscannable QR code helps no one.
Generate on A2Z Edit, then follow contrast, size, and testing basics before you print.
Steps
- Generate a high-contrast code with enough quiet space around it.
- Export at a resolution suitable for the final print size.
- Place it where hands and glare will not constantly cover it.
- Test from the real viewing distance.
- Reprint if scans fail more than rarely.
Why it matters
Reliable scans protect campaigns from silent failure.
Tips
- Avoid putting logos over the center unless you know error correction still holds.
- Do not warp the square into a decorative rectangle.
- Pair outdoor codes with short memorable URLs as backup.
Print tests
Dark on light, quiet space, test two phones at the real print size. Brand-color low contrast looks elegant and fails in parking lots.
Short https URLs you control beat tracking monsters. The PNG does not expire; the website can.
Frequently asked questions
How big should a wall QR be?
Large enough that a phone fills the code easily from typical standing distance.
Color codes OK?
Yes if contrast stays strong—dark on light is safest.
Damaged stickers?
Replace them; missing modules kill scan rates.
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