Cookies and Policy generators Advice

I’m in the process of setting up the cookie policy for my website. I came across cookie policy generators (and cookie testers). They all seem to be free…at least to start. Any one use any of these with a site(s)? I know a lot of sites post cookie policy banners but they’re not really compliant with GDPR. I’m worried the free cookie policy generators will actually add cookies to my site.
Just looking for advice and an idea on what others are doing.
Thanks1