Help / QR codes
How QR codes work
From payload to modules
A QR code is a square grid of dark and light modules encoding binary data. Scanners invert perspective, sample the grid, and reconstruct the payload — commonly a URL, Wi‑Fi string, or vCard fragment.
Error correction duplicates information so damaged print or glare still decodes. SnapTools defaults to a balanced level suited for posters and business cards.
Safe campaigns
Treat QR destinations like clickable links: use HTTPS, avoid URL shorteners that hide the final domain, and rotate codes when promotions expire.
Because SnapTools renders codes locally, your draft URLs are not logged on our servers for this workflow.