Hi
Please try out
https://www.crozl.com , yet another site for free crossword building and sharing.
What is the difference: Crozl gives suggestions for words that match while it includes clues from wiktionary word definitions, and makes dense crossword building super easy.
One can put as much effort as he likes, in fact the app has a button for automatically building (or finishing) pretty good random dense crosswords.
Crozl is not about building professional symmetric crosswords. The idea is to democratize crossword building and re-engage young people to challenge their friends, with personalized crosswords shared through social media.
Keep an eye for the upcoming feature of embedding built (or existing) crosswords into any site or blog.