Quiet zone fails on dark posters: leave a clear margin
A QR needs empty space around it. Busy backgrounds and tight crops are a common print reject.
12 November 2026
Answer: Generate the code in the checker and watch the quiet-zone warning. Keep a clear margin — do not let artwork touch the modules.
Tool: QR print checker — free, runs in this browser.
The quiet zone is the blank collar around the symbol. Cameras use it to find the code. If a photo, gradient, or poster edge invades that collar, scans fail even when the modules look sharp on screen.
Dark posters are tricky because designers often place a white QR on black without enough white padding outside the modules. The checker flags a thin margin before you send the PDF to press.
Fix layout first, then print a test sheet at real sizes. Screen zoom is not proof — phones at arm’s length are.