OK for me now:
https://www.wordplays.com/crossword-solver/
My favourite solution site is Danword though
http://www.danword.com/
. . . and a tool that I wouldn't be without (and use greatly when setting my own crosswords) is TheSage. It's not a website but a fantastic piece of free software that can act as a dictionary, a thesaurus, an anagram finder and much more. My favourite feature is its 'wildcard' one, whereby asking it for all answers fitting '?a??t?e' instantly offers these possibilities:
garotte
gavotte
gazette
habitue
Kakatoe
Lafitte
Lao-tse
layette
manatee
palette
Ratitae
Yangtze
https://www.sequencepublishing.com/1/