QR Code Size for Printing: The Complete Guide
How big should a printed QR code be? Minimum sizes for business cards, flyers and posters, the 10:1 distance rule, quiet zones, resolution and file formats.
How to Create a WiFi QR Code (Step by Step)
Create a WiFi QR code in two minutes so guests can join your network without typing the password. Works on iPhone and Android. Includes security tips and fixes.
Do QR Codes Expire? The Truth About Static vs Dynamic QR Codes
Static QR codes never expire, but many "free" dynamic codes stop working after a trial. Learn the difference and how to avoid a dead printed QR code.
How to Spot a Fake or Dangerous QR Code
QR code scams ("quishing") hide on parking meters, letters and emails. Learn the warning signs, how to check a link safely and what to do if you scanned one.
QR Codes for Restaurants: Menus, Reviews and WiFi
How restaurants use QR codes for menus, Google reviews, WiFi, ordering and payments, with tips on placement, sizing, printing and avoiding subscription traps.
Why Did My QR Code Stop Working?
A QR code that used to scan now fails or opens the wrong page? Find the cause in minutes: expired trials, moved pages, damage, size, contrast and more.
Static vs Dynamic QR Codes: Which Should You Use?
Static or dynamic QR code? A plain comparison of cost, editing, tracking, privacy and what happens if a subscription ends, with a quick decision guide.
How to Replace an Expired QR Code
Your dynamic QR code was deactivated? Find the original destination, make a permanent static replacement and fix printed material with the least reprinting.
How to Make a UPI QR Code for Your Shop
Create a free UPI QR code that works with every UPI app, choose a fixed or open amount, print a Scan & Pay counter stand and protect it from fake QR stickers.
What Is a QR Code?
A plain guide to QR codes: what they are, who invented them, how the pattern stores data, static vs dynamic, error correction, sizes and how to make one free.
How to Scan a QR Code
Step-by-step ways to scan a QR code with an iPhone, Android phone, laptop or from a screenshot, plus what to do when the camera won't read the code.
QR Code vs Barcode: What's the Difference?
QR code or barcode? How they differ in data, scanning, cost and retail use, when you need an EAN or UPC from GS1, and where Data Matrix and PDF417 fit in.
QR Code Error Correction Levels Explained
What QR code error correction does, how the L, M, Q and H levels differ, how they change code size, and which level to choose for print, logos and outdoor use.
QR Code Best Practices: 15 Rules for Codes That Work
Fifteen practical rules for QR codes that people scan: content, design, size, placement, testing, security and tracking, with a printable checklist at the end.
QR Codes on Product Packaging: A Practical Guide
How to use QR codes on product packaging: what to link to, size and placement, materials and print processes, batch codes, GS1 Digital Link and testing proofs.