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A static QR code has the content baked directly into the pattern — once made, it never changes and never expires. A dynamic QR code instead points to a short redirect link that you can update later, but that requires a service to host the redirect. The codes made here are static.

No. A static QR code works for as long as the pattern itself is readable and whatever it points to (a website, a Wi-Fi network, a number) still exists. There's no built-in expiry date.

A QR code can hold a few thousand characters of text, but the practical limit is much lower — the more you pack in, the denser and harder to scan the pattern gets. Short links and brief text scan far more reliably than long paragraphs.

Not with this tool. Adding a logo covers part of the pattern, so it only stays scannable at a high error-correction level and with careful sizing — this generator keeps things simple and doesn't support it.

As a rule of thumb, print it at least 2 x 2 cm for close-up scanning, and larger for anything viewed from a distance (a poster or banner). Denser codes — long links, Wi-Fi details, contact cards — need more room than a short link does.

Yes. Scanners rely on strong contrast between the pattern and the background, so dark-on-light combinations work best. Very light or low-contrast color pairs can make a code unreliable to scan, even if it looks fine to the eye.

Scanning the code itself doesn't need internet — that's just your camera reading a pattern. But if the code contains a website link, you'll need a connection to actually open that page once it's decoded.

The password is stored in plain text inside the code, so anyone who scans it can read it. That's fine for guests you trust, but avoid printing or posting a Wi-Fi QR code somewhere strangers could scan it.