From a web address to a scannable link
Paste the complete address, including https:// or http://. For example, https://example.com/menu?lang=en points to an existing menu page. Check the domain, path, and any query parameters before making the image.
Choose a size and colors, inspect the preview, then select Verify QR and download the image. Use SVG for a design that needs to scale, or PNG for a straightforward image upload. Print / Design a card carries the current design into the print tool.
What someone sees after scanning
A phone typically identifies the encoded address and offers to open it in a browser. Visiting that address requires a working connection and an available destination. The generator does not host your page or upload a file for you.
The printed link stays fixed. You can update the content served at an address you control, but changing the address inside an existing QR image requires a new image. 4ool does not add a redirect, an expiry date, or a scan limit.
Make the destination easy to trust
Prefer a short, stable address on a domain you control. Long tracking parameters increase the encoded data and can make the pattern denser. A visible domain or description beside the QR helps people decide whether to open it.
An address can be syntactically valid and still return an error or point to the wrong page. Test the actual destination on a phone before sharing. Do not publish a private access token or password inside a link: anyone with the QR can read the address.