Privacy
What this site collects: almost nothing. Your letters are solved on your own device and never sent to a server.
Whatever you type gets solved on your own device. None of it reaches a server, because there is not one to reach - this is a set of static files, and the dictionary is fetched into your browser and searched there.
There are no accounts, so there is no personal data to collect. No advertising or tracking cookies are set either.
The one thing kept on your device is whether you prefer light or dark mode, stored locally in your browser. It says nothing about who you are and is never sent anywhere.