QR Code Generator

Choose the Wi-Fi type, enter the network name exactly as it appears including capitals, pick the security type and enter the password. Scanning it offers to join the network without anyone typing the password. Tick "hidden network" only if your router does not broadcast its name, or the code will not work.

The password is stored in the code as plain text, so anyone who scans or photographs it can read it. That is fine for a printed card you hand to guests, and a bad idea for anything posted publicly. Use your router's guest network if it has one.

A contact card. Scanning it offers to save the person straight to the phone's address book, which is why they appear on business cards and email signatures. Keep it to name, phone, email and company — adding a full address and notes makes the code dense and harder to scan from a small print.

No. The content is encoded directly in the pattern, so the code works forever with no account, tracking or redirect service in between. That also means it cannot be edited later — reprint the code if the details change.

Usually contrast, size or the quiet zone. Keep the foreground dark on a light background — inverted codes fail on many phones — leave the white border alone, and print at least 2 cm across for arm's length or 5 cm for a poster. Very long content also makes the pattern dense; shorten it or link to a page instead.

Yes, if you set error correction to Q or H first — those levels can lose up to a quarter or a third of the pattern and still decode. Keep the logo small, centred, and test it on more than one phone.