Articles
Guides, updates, and notes from the QRDock team.
QR Code Error Correction: How Logos and Damage Don't Break the Scan
May 30, 2026
QR code error correction is the built-in math that recovers your data when part of the symbol is smudged, scratched, or covered by a logo. Here is how the four levels — L, M, Q, H — actually work, and which one to pick.
How to Generate a Payment QR Code for Apple Wallet, Venmo, or PayPal
May 27, 2026
The payment QR code you need usually already exists inside Venmo, PayPal, or an Apple Wallet pass — you just have to know where to look. This guide walks through all three, plus how to print one that won't get sticker-swapped.
QR Code Menus: Are They Going Away or Here to Stay?
May 21, 2026
QR code menus exploded during the pandemic, then ran into a backlash. At sit-down restaurants diners want paper back; at cafes and fast-casual spots the codes are holding on. Here's what the surveys actually show, where QR menus still earn their place, and the hybrid setup most restaurants are landing on — plus what to do if you keep one.
How to Make a vCard QR Code That Saves Contact Info in One Tap
May 18, 2026
Build a vCard QR code that scans cleanly on iPhone and Android. Field choices, vCard 3.0 vs 4.0, error correction, and testing — all in 850 words.
QR Code vs. Barcode — When to Use Which (and What Your Phone Can Read)
May 17, 2026
QR codes are barcodes — specifically, two-dimensional ones. This is the practical difference between the striped retail barcode on a soup can and the square code on a menu, including how much data each holds, what your phone can read out of the box, and when to pick which format.
Quishing Explained: Why QR Code Phishing Doubled in the Last Year
May 15, 2026
Quishing is phishing dressed up as a QR code. Cases roughly doubled in the last year because the QR image bypasses email filters, lands the victim on a personal phone outside corporate defenses, and now shows up in state-actor playbooks. Here is what it is and how to spot it before you tap.
How to Create a Wi-Fi QR Code So Guests Connect Without Typing the Password
May 12, 2026
Typing Buffalo7$Caterpillar! into a guest's phone is a small kind of cruelty. A Wi-Fi QR code skips that. Here's the format, how to make one, and where it works.
Is It Safe to Scan a QR Code? Quishing, Sticker Scams, and How to Stay Safe
May 10, 2026
Scanning a QR code is as safe as the URL it points to — no more, no less. Quishing (QR-code phishing) and physical sticker overlays on parking meters, menus, and packages are the two patterns to watch for. Here's how to spot both, and what to do if you already scanned a bad one.
How QR Codes Actually Work — Finder Patterns, Modules, and Error Correction
May 6, 2026
What's inside a QR code — the grid of modules, the three corner finder squares, and the Reed–Solomon error correction that lets a smudged code still scan.
What the Three Squares in a QR Code Actually Do (Finder Patterns Explained)
The three big squares in the corners of a QR code are called finder patterns. They are the reason your phone can detect a code in a fraction of a second, at any angle, even when part of the code is scratched or covered by a logo. Here is what each square actually does and the 1:1:3:1:1 ratio behind them.