to all preev lovers, and for those who are used to it and find it difficult to change their habits https://preev.net/ is online 
so it's not a .com domain, it's a .net
there is also a different script (thanks to ETFbitcoin for the suggestion) which uses CoinGecko API for conversion
Thank you for your contribution, I'm glad someone did this, and I already proceeded to delete Preev.com from the suggested websites so yours pops up first now. It's honestly a great alternative, but I'd like to point out some minor things that would render it perfect. Firstly, the favicon has a white background instead of it being transparent, tiny detail indeed, but it's a 2-minute fix, so why not? so it's not a .com domain, it's a .net
there is also a different script (thanks to ETFbitcoin for the suggestion) which uses CoinGecko API for conversion
P.S I have a tendency to spot such little imperfections, don't mind me
to be honest, I'm a little taken aback by the whole thing. I added the script just enough to give functionality to the site itself, certainly this is not the final solution.
now that I'm here, the plan is to add more functionality. I will probably open a separate topic to collect the best suggestions from the community, in order to make a stable and useful service.