Guides
QR Code Security: How Quishing Works and How to Stay Safe
Malicious QR codes are a real and growing problem. What the attacks look like, and what both scanners and publishers should do.
CQRG Team 3 min
Content
The CQRG Blog
Practical guides on designing, printing, and tracking QR codes that get scanned.
Guides
QR Code Best Practices: Size, Contrast & Error Correction
Most QR scanning failures come down to three fixable things: size, contrast, and error correction level. Here is what actually matters.
CQRG Team 3 min
Guides
How to Design a QR Code That Matches Your Brand
A default black-and-white QR code works, but a branded one gets scanned more. Here is how to customize yours without breaking it.
CQRG Team 3 min
Use Cases
QR Codes for Social Media: Turning a Scan Into a Follow
A QR code cannot make someone follow you, but it can remove every excuse not to. Here is how to point one at the right destination, and where a printed code genuinely beats a spoken handle.
CQRG Team 3 min
Tutorials
Bitcoin QR Codes: Sending and Receiving Crypto by Scan
A Bitcoin QR code is not just a picture of a wallet address. It can carry an amount and a label too, so a scan opens a wallet app with the payment half-filled in. Here is the format, and how to use it safely.
CQRG Team 4 min
Tutorials
SMS QR Codes: Pre-Filled Text Messages From a Scan
Scan this, and the Messages app opens with a number and a message already typed in. Here is how SMS QR codes are actually encoded, and where they genuinely save someone a step.
CQRG Team 3 min
Guides
Bulk QR Code Generation: Make 100 Codes From One Spreadsheet
How to plan a spreadsheet, turn it into up to 100 QR codes in one pass, and check the batch before it goes to print, so every table, tag, and badge scans.
CQRG Team 8 min
Guides
How to Scan a QR Code on iPhone and Android (No App Needed)
Every iPhone since 2017 and most Android phones since 2018 can scan a QR code with nothing but the built-in Camera app. Here is exactly how, on both platforms, and what to do when it does not work.
CQRG Team 3 min
Guides
QR Code vs Barcode: What Is Actually Different
A barcode and a QR code look like cousins, but they solve different problems. The real differences are capacity, scan direction, and error correction — here is what each actually means in practice.
CQRG Team 4 min
Use Cases
QR Codes on Product Packaging: From Shelf to Screen
Packaging is the hardest surface a QR code has to survive: curves, creases, scuffs, and press conditions that thicken every module. Here is what to change.
CQRG Team 9 min
Use Cases
QR Codes on Business Cards: Small Codes That Still Scan
A business card is the smallest surface a QR code ever gets. Here is the size floor, the payload limit, and the finish that quietly ruins both.
CQRG Team 9 min
Use Cases
QR Codes on Brochures: What to Link and Where to Put It
A brochure is already the long read, so its QR code has to offer something paper cannot. Here is what to link, where to place it, and how to print it.
CQRG Team 9 min
Tutorials
vCard QR Codes: Building a Digital Business Card
A vCard code drops your full contact details into someone’s phone in one scan. Here is how to build one that imports cleanly.
CQRG Team 2 min
Tutorials
How to Make a Wi-Fi QR Code (and Where to Put It)
A Wi-Fi QR code lets guests join your network without anyone reading a password out loud. Here is how the format works and where it pays off.
CQRG Team 2 min
Tips & Tricks
Sending QR Codes to Print: A Pre-Flight Checklist
Vector or raster, CMYK surprises, bleed, and the test that catches almost everything, before you commit to a print run.
CQRG Team 3 min
Guides
Static vs Dynamic QR Codes: Which One Do You Need?
Static codes encode the destination directly; dynamic codes point at a redirect you control. The difference matters most after printing.
CQRG Team 2 min
Guides
QR Code Analytics: The Metrics That Actually Matter
Scan counts alone tell you very little. Here is how to read QR analytics in a way that changes decisions.
CQRG Team 3 min
Use Cases
QR Codes for Restaurants: Menus That Do Not Annoy Guests
The QR menu earned a bad reputation for good reasons. Most of them are fixable with better implementation.
CQRG Team 2 min
Guides
Why Your QR Code Is Not Scanning: 9 Causes and Fixes
A checklist for diagnosing a QR code that will not scan, ordered from the most common cause to the most obscure.
CQRG Team 3 min
Tips & Tricks
Where to Put a QR Code So People Actually Scan It
Placement, context, and a clear reason to scan matter more than the design of the code itself.
CQRG Team 2 min
Tips & Tricks
5 Creative Ways to Use QR Codes in 2026
QR codes have outgrown the restaurant menu. Here are five inventive ways brands and individuals are using them this year.
CQRG Team 2 min