All guides
Do QR codes expire?
A QR code itself never expires — but a dynamic code can die when a subscription ends. How to tell which kind you have, and how to get an editable code without the risk.
GS1 Digital Link: QR codes on products, explained
How GS1 Digital Link puts a product's GTIN, batch and expiry into a QR code that both checkouts and phones can read, what Sunrise 2027 means for brands, and how to build one correctly.
How QR codes work, from pattern to payload
A clear technical walkthrough of a QR code: the finder and timing patterns, how text becomes bits in each encoding mode, Reed–Solomon error correction, masking, and how a phone reads it.
How to scan a QR code on any device
Scan QR codes with the built-in camera on iPhone and Android, from a screenshot or photo, on a Windows or Mac computer — and what to do when a code will not scan.
QR code design: how to customise without breaking it
Which colours, logos, dot styles and print finishes keep a branded QR code scannable — with the contrast numbers, logo limits and pre-print checklist designers need.
QR code error correction levels, explained
What the L, M, Q and H error correction levels actually protect against, how much data each leaves room for, and which one to choose for print, packaging and logos.
QR code scams and how to spot a malicious code
How "quishing" works — fake parking stickers, phishing emails with QR codes, fake delivery notes — and the checks that stop it, for people scanning codes and for businesses printing them.
How big should a QR code be?
Minimum QR code print sizes for business cards, menus, posters and billboards, the 10:1 distance rule, and why the amount of data matters as much as the distance.
QR code vs barcode: what is the difference?
Linear barcodes and QR codes compared on capacity, scanning, error correction and cost — plus Data Matrix, and how to decide which one your product, shop or warehouse needs.