QR Code Guides
Practical, accurate guides on how QR codes work, how to size and print them, and how to use them safely, written to actually answer the question, not pad out a word count.
The technology behind the pattern: how a scanner turns black-and-white squares into data.
What the difference actually means in practice, and which one you need.
Size, contrast, and quiet zone rules that keep a printed QR code scannable.
Concrete sizes for business cards, flyers, posters, and storefronts, with the rule behind the numbers.
What QR codes can and can't do, and how to spot a QR code scam.
What the four error-correction levels actually mean, and how to pick one.
Why the pattern itself never expires, and what actually breaks a QR code over time.
A quick walkthrough for making your first QR code, whichever type you need.
Which color combinations actually scan reliably, and which ones just look nice until they don't.
Logo size, placement, and error correction: the three things that decide whether a logo QR code still scans.
Three ways to bridge physical and digital, and when each one actually makes sense.
Short answer: no, not anymore. Here's what changed, and when a dedicated app still helps.
Real, specific places to put a QR code that people will actually scan, organized by what you're trying to achieve.