QR codes, paper-ready.

No. The QR is generated entirely in your browser via JavaScript. Whatever you type — URL, Wi-Fi password, vCard contact info — never leaves your device.

QR codes contain redundant data so they still scan when partially damaged. Level L recovers ~7%, M ~15%, Q ~25%, H ~30%. Higher levels mean more dots in the code (denser pattern). For print, H is safest because the code might survive coffee spills, folds, or scratches.

Rule of thumb: 1cm × 1cm minimum for a phone scan from arm's length. 3×3cm for posters scanned from across a room. Bigger always works; smaller might fail in low light. The download-size slider lets you pick the pixel resolution that prints sharp at any physical size.

QR codes have versions 1-40, each with more capacity. Add more text, the encoder picks a higher version with more rows and columns. The pattern becomes denser. You can also drop the error-correction level to fit more text into a less-dense code.

Not in v1 — keep an eye out. With high error correction (Q or H), QR codes can lose ~25% of the dots and still scan, which is how center-logo QRs work. For now, run the result through Add Text to Photo or your design app to drop a logo over the center.

WIFI:T:WPA;S:network;P:password;; — the prefix tells the phone it's Wi-Fi credentials. Replace 'network' with your SSID and 'password' with your password. The phone OS handles the connection automatically when scanned.