QR code hub

Everything you need to know about QR codes

Clear, honest guides — no jargon. Learn what QR codes are, how to make one that stays scannable, and how to avoid the traps of “free” generators.

What is a QR code?

A plain-English explanation of what a QR code is, how it works, and what the little squares actually mean.

A step‑by‑step guide to making a branded QR code you can edit later and download in print quality.

Why so many “free” QR codes stop working — and how to get one that won’t hold your printed campaign hostage.

The single most important QR decision: fixed‑forever vs editable‑and‑trackable. A clear comparison.

Dozens of practical ways businesses use QR codes — and how to make each one measurable.

How a 1994 invention for tracking car parts became the little square on everything from menus to museums.

Minimum sizes, the scan-distance rule of thumb, why module size matters, and which file to send to your printer.

What can and can’t be changed once a code is on paper, and your options if the link is wrong or has stopped working.

What scan analytics can tell you, what they can’t, and a simple way to compare one placement with another.

How QR code scams work, the checks worth making before you tap, and what to do if you’ve been caught out.

What a business card code should open, how big to print it, and how to stop your cards going out of date.

PDF or web page, table cards that scan first time, updating dishes and prices, and when to keep paper menus.

Sizing for viewing distance, wording that earns a scan, the page people land on, and how to compare locations.

Part of the Host Dada family of tools: QR Code Generator on Host Dada

Create a branded, editable QR code with Host Dada — transparent pricing from £4.99/month.