QR codes have four error-correction levels — L (~7%), M (~15%), Q (~25%) and H (~30% recoverable). When you place a logo in the centre you are deliberately obscuring part of the data, so you need the highest redundancy: level H. AnyTool automatically switches to H when you add a logo, keeps the logo under about 22% of the code area, and never covers the three corner finder patterns, so the code stays scannable. Even so, you should test the finished code with a real phone before printing.

Choose the WiFi content type in AnyTool QR Code Generator, then enter the network name (SSID), the encryption (WPA, WEP or open) and the password. The tool encodes the standard WIFI:T:WPA;S:NetworkName;P:password;; string, escaping any special characters in the name or password for you, and marks the network hidden if you ask. Most modern phones join the network automatically when they scan it. Because everything runs in your browser, your WiFi password is never uploaded.

AnyTool creates static QR codes: the content you enter is encoded directly into the pattern, so the code works forever, has no redirect link, and cannot be tracked, edited or made to expire. That also means it is fully private — the code is generated entirely in your browser with no server or CDN, so the data you encode and any logo you add never leave your device. The trade-off is that, unlike a paid dynamic code, you cannot change the destination after printing, so double-check the content first.

The most common scan failures come from low contrast (use a dark foreground on a light background), a missing quiet zone (leave at least four modules of empty space around the code), a logo that is too big or covers a corner finder pattern, or content so long that the code becomes a dense mass of tiny modules. AnyTool shows a live scannability hint that checks your contrast, error-correction level and logo size, but you should always scan the finished code with a couple of real phones before printing it at the final size.