To get formatted information (like conjugation charts) from a website onto your Anki flashcards, we don't recommend copying the text; we recommend taking a screen-grab/shot.
On a Mac, the default command is Command-Control-Shift-4. There's an article on this over here:
For Windows, there's a simple way involving the PrtSc (print screen) button and paint. You can learn how to do this here: https://www.internet4classrooms.com/prtsc2paint2word.htm