If you need a quick brain break without the headache of creating an account,...

https://mag-wiki.win/index.php/CardGames.io_vs_Solitaire.com:_Which_Has_Fewer_Distractions%3F

If you need a quick brain break without the headache of creating an account, Solitaire Bliss is my go-to. It loads instantly on your phone or work desktop and features 500+ variants if you get bored of the basics