Paste a link, get a code, download the PNG. No account, no watermark and no redirect that can expire.
A QR code stores your text as a grid of modules with error correction built in, which is why a code still scans with a corner scuffed or a logo dropped in the middle. This page uses medium correction, recovering from roughly 15% damage — a sensible default for print.
The code is generated in the page and downloaded straight from your browser. Nothing is stored, and crucially the code contains your link directly rather than pointing at a redirect on someone else's domain, so it cannot be switched off or start charging later.
No. The link is encoded in the pattern itself, so there is no service in the middle that can expire, rate-limit or start charging. Dynamic codes from marketing platforms work the other way and stop working if the account lapses.
Pick the 800 pixel option and size it in your layout at 2cm or more. The rule of thumb is that scanning distance can be about ten times the width of the code.
Yes, in an image editor afterwards. Error correction tolerates a small central overlay — keep it under about 15% of the area and test the result before printing thousands.
Several hundred characters technically, but long text makes the pattern dense and harder to scan. Short URLs work best.
Yes — encode the text WIFI:S:NetworkName;T:WPA;P:YourPassword;; and most phones will offer to join the network when they scan it.