Hosted page

Every form has a page of its own:

https://forms.justinjongstra.nl/f/YOUR-FORM-ID

Share the link, put it in an email signature, print the QR code from the Share panel. Nothing to install and no site required.

Add ?embed=1 to strip the page chrome. That is what the iframe mode points at.

The page is served by the form host, so it stays in step with the form automatically. It also means it keeps working when the rest of your site does not.