Guides

Practical notes on QR codes: what breaks them, what the settings actually do, and what to check before you print.

QR code versions explained

What the grid sizes mean, why the generator picks them for you, and why the logo option changes the density.

The six causes I see most often, in order of how easy they are to fix, plus a testing routine that finds them.

How the WIFI payload works, which characters need escaping, and where to put the code so guests can actually scan it.

Which format to download depending on whether the code is going on a screen or into print.

The payload format, the fields worth including, and why a full contact record makes a dense code.

How large a logo can be, what makes a good one, and when to skip the branding and use a plain code.

Sizing by scan distance rather than by number, and what the quiet zone and print quality do to reliability.

Where the real risk sits, the tricks worth knowing about, and the habits that catch them.