Every functionality works locally within your browser. This means your personal information (which includes but is not limited to anything you provide) is constrained within your browser and never transmitted across external infrastructure.
I use Simple Analytics (GDPR Compliant) for analysing page traffic where all information is aggregated and anonymised. Cookies aren't used to collect usage metrics and no individual user profile is created for tracking.
Most of my web pages don't use any third party dependencies but if a page does, they are generally self-hosted and explicitly stated (e.g. the Deezer API is used for the "Deezer Artwork Finder" web page).