QR Code Guides
Short, practical articles on making QR codes that actually get scanned.
Eight guides, all written for the same moment: you have a QR code and now it has to work in the real world — on a card in someone's hand, a sticker on a window, a flyer, a poster across a room. Each one is short and specific, and describes how phone cameras actually behave rather than how QR codes are marketed.
If QR codes are new to you, start with how QR codes work: it explains modules, the quiet zone and the L/M/Q/H error-correction setting that the other guides keep referring to. If you already have a code that misbehaves, go straight to the troubleshooting guide. The table below maps common situations to the guide that answers them.
How QR Codes Work: Modules, Error Correction and Versions
What is actually inside a QR code, why it still scans when partly covered, and what the L/M/Q/H setting does.
Updated: 2026-08-31vCard QR Codes for Business Cards: What to Include
Which contact fields belong in a business-card QR code, how data volume changes the symbol, and mistakes to avoid.
Updated: 2026-09-08Wi-Fi QR Codes for Cafés, Shops and Guest Rooms
How to share guest Wi-Fi with a QR code, where to place it, and how to keep your network reasonably safe.
Updated: 2026-09-08Printing QR Codes: Size, Contrast and Quiet Zone
Separate print-size estimates from requirements, preserve the quiet zone, and test contrast and resolution on a physical proof.
Updated: 2026-09-30PNG vs SVG: Which QR Format Should You Download?
The practical difference between raster and vector QR files, and which one to pick for web, print and design tools.
Updated: 2026-09-30QR Code Not Scanning? 10 Causes and How to Fix Them
Why a QR code will not scan — size, contrast, inversion, quiet zone, blur, glare, damage, data, camera, dead link — and the fix for each.
Updated: 2026-09-30QR Code Size Guide: Plan and Test Your Print
Use scanning distance as a planning estimate, account for data density and quiet zones, then test the final QR print on its real material.
Updated: 2026-09-30Static vs Dynamic QR Codes: Which One Do You Need?
What separates a static QR code from a dynamic one, when each is worth it, and URL best practices — https, short links, UTM tags.
Updated: 2026-08-31
Which guide do you need?
| I want to understand what is inside a QR code before I change any settings | How QR Codes Work: Modules, Error Correction and Versions |
|---|---|
| I want to put my contact details on a business card | vCard QR Codes for Business Cards: What to Include |
| I want guests to join my Wi-Fi without typing the password | Wi-Fi QR Codes for Cafés, Shops and Guest Rooms |
| I want a code that survives going to the printer | Printing QR Codes: Size, Contrast and Quiet Zone |
| I want to know whether to download PNG or SVG | PNG vs SVG: Which QR Format Should You Download? |
| My code will not scan and I need to find out why | QR Code Not Scanning? 10 Causes and How to Fix Them |
| I want to know how big to make a code for a poster or a sign | QR Code Size Guide: Plan and Test Your Print |
| I want to change the link later, or count how many people scanned it | Static vs Dynamic QR Codes: Which One Do You Need? |