QR Code Blog

Practical guides for creating, sizing, printing and troubleshooting QR codes.

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These guides cover the parts of QR codes that trip people up in practice: how big the code has to be, why a printed code refuses to scan, what error correction actually buys you, and when a static code is the wrong choice. Every guide is written around a real decision you have to make before you print anything.

If you just need the code itself, open the QR code generator.

Getting started

How to Create a QR Code for a Website Pick the right destination, add UTM tags, keep the URL short enough to print small, and test four things before the code goes on paper. 6 minutes read How to Share WiFi With a QR Code WiFi QR codes: the WIFI: string format, escaping semicolons and backslashes, hidden network quirks, iOS vs Android differences, guest isolation and password rotation. 6 minutes read QR Codes on Business Cards: What Actually Works What belongs in a vCard QR code, why vCard 3.0 beats 4.0 for compatibility, how field count affects scan reliability, sizing and placement on a printed card. 6 minutes read Setting Up Restaurant Menu QR Codes Properly Restaurant menu QR codes done properly: web page over PDF, table sticker sizing, staff scripts, ordering vs browsing, multi-language menus, allergen updates and cleaning. 7 minutes read Getting More Google Reviews With QR Codes How to get your Google review link, where to place review QR codes, timing that actually works, and why review gating and incentivised five-star asks break Google's policy. 6 minutes read EPC QR Codes on Invoices: A Guide for European Businesses EPC QR codes on invoices: the 12 fields in order, EUR amount format, 70/34/35 character limits, why German-speaking countries lead adoption, and the failures that stop bank apps from parsing them. 7 minutes read

Troubleshooting

Why Your QR Code Won't Scan and How to Fix It A QR code that won't scan is almost always physics, not software. Diagnose contrast, quiet zone, print size, dot gain and glare with a symptom-to-fix table. 6 minutes read

Printing

What Size Should a QR Code Be? A Practical Print Sizing Guide Concrete minimum QR code sizes for business cards, table tents, posters, shop windows and outdoor signs, plus how version, module count and print process change the answer. 6 minutes read

Technical

QR Code Error Correction: L, M, Q and H Explained What QR error correction levels L, M, Q and H really mean, how Reed-Solomon recovery works in plain terms, and the exact capacity you give up at each level. 6 minutes read Static vs Dynamic QR Codes: Which One Do You Actually Need? Static QR codes encode data directly and last forever. Dynamic codes redirect through a short link you can edit. Which one you need, and what a redirect really costs. 6 minutes read

Security

QR Code Security: Real Risks and How to Protect Yourself A QR code is a link you cannot read. That is the whole security problem. The real risks, how overlay and quishing attacks work, and what businesses should do. 6 minutes read

Strategy

QR Code Campaigns That Actually Get Scanned Why most QR campaigns get ignored: no reason to scan, no signal at the scan point, a desktop landing page. Call-to-action copy you can steal, placement timing, A/B testing. 7 minutes read

QR code generators by type

URL QR CodePoint a code at any website, form or campaign page. WiFi QR CodeLet guests join a network without typing the password. vCard QR CodeSave a contact from a card, badge or sign. WhatsApp QR CodeOpen a chat with a prefilled message. Google Review QR CodeAsk customers for feedback at the right moment. Restaurant Menu QR CodeLink tables and packaging to a digital menu. PDF QR CodeShare catalogues, manuals and brochures. EPC Payment QR CodeSEPA transfer data for European invoices.