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QR code guides and articles

Practical, tested advice on QR codes: how they work, how to design them so they scan, and how to use them well.

Basics

The History and Future of the QR Code

The QR code was invented in 1994 at Denso Wave, a Toyota-group company, to track car parts. Its unenforced patent made it free to adopt — and its future spans payments, product data and authenticity checks.

7 min read

Basics

How to Scan a QR Code on iPhone, Android and Desktop

Point your phone's camera at a QR code and tap the link that appears, or read a code from a photo, screenshot or desktop image with Google Lens or a browser-based scanner.

7 min read

Technical

Why a QR code will not scan: 12 causes and fixes

A QR code usually fails to scan for one of twelve simple reasons — contrast, size, density, quiet zone, glare, damage, distortion, or a dead link. Here is how to pinpoint the cause and fix it.

7 min read

Business

QR codes for events and tickets: check-in without queues

How organizers use QR codes for tickets, check-in, schedules and feedback — plus why unique codes, list validation and offline backups matter more than the code itself.

7 min read

Business

Using QR Codes in Marketing: Ideas That Work and Mistakes to Avoid

QR codes connect print and physical marketing to your website — if people have a reason to scan and land on a fast mobile page. Here is where they work, how to track results, and which mistakes to avoid.

7 min read

Safety

QR code scams (quishing): how to scan safely

Quishing is phishing by QR code: fake stickers, scam emails and urgent payment pages hidden behind a scan. Learn to preview links, spot fake domains and scan safely.

7 min read

Safety

QR codes and privacy: what a code can reveal about you

A QR code itself is just data. This article explains where the privacy risks really come from, what a website can learn when you scan, and how to keep your codes and scans private.

7 min read

Business

vCard QR codes for business cards: share contact details in one scan

A vCard QR code lets anyone scan your business card and save your contact details straight to their phone. Here is what to include, what to leave out, and how to print a code that scans first time.

7 min read

Business

QR code tracking: what you can measure and how to respect privacy

Only dynamic QR codes routed through a redirect can count scans — and even then, never who scanned. What you can measure, what you cannot, and privacy-friendly tracking habits.

7 min read

Business

QR codes for restaurant menus: setup, placement and mistakes

How to set up QR code menus for restaurants: static vs dynamic codes, why a mobile web page beats a PDF, table placement and lighting, printed fallbacks, and the mistakes that make guests give up.

8 min read

Basics

How to Make a Wi-Fi QR Code for Guests

A Wi-Fi QR code stores your network name, security type, and password so guests can join with a scan. Here's what goes inside, where to display it, and how to keep it safe.

7 min read

Design

QR Code Size and Print Guide: How Big Should It Be?

A practical guide to printed QR code sizes: the one-tenth scanning-distance rule, the 2 cm minimum, vector versus raster files, surface and ink tips, and how to test a proof before a full print run.

7 min read

Technical

QR code error correction levels L, M, Q and H explained

What QR code error correction levels L, M, Q and H can recover, when to use each, and how robustness trades off against pattern density and data capacity.

7 min read

Technical

How QR codes work: modules, finder patterns and error correction

A plain-language tour of what the squares in a QR code actually do: how your camera finds the grid, reads the data, and repairs damage with built-in error correction.

7 min read

Design

QR Code Colors and Contrast: What Scans and What Does Not

QR scanners read tone, not hue: a code scans when its modules are much darker than the background. Learn why inverted and low-contrast codes fail, and how to pick brand colors that still work.

7 min read

Design

How to add a logo to a QR code without breaking it

A small, centred logo can sit safely on a QR code thanks to error correction. Here is how to pick the right correction level, size the logo, keep the background clean, and test it properly.

7 min read

Design

QR Code Design Best Practices That Keep It Scannable

A scannable QR code needs strong contrast, dark modules on a light background, a clear quiet zone and an undistorted pattern. Learn the design rules, common mistakes and a pre-print checklist.

7 min read

Basics

How to create a QR code in five steps

A practical five-step guide to making a QR code that scans reliably: choose the destination, pick the content type, verify the data, design for contrast, and test on two phones before printing.

7 min read

Basics

Static vs dynamic QR codes: which one do you need?

A static QR code carries its data inside the pattern and works forever; a dynamic one is an editable, trackable redirect that depends on a service. Here is how to choose for cards, menus, packaging and Wi-Fi signs.

7 min read

Basics

What is a QR code? A plain-language guide

A beginner-friendly explanation of QR codes: what they are, what they can store, how they differ from barcodes, and what to check before you create your first one.

6 min read