In case anyone wants to use these for some other writing...

Flesch Reading Ease score: https://www.textcompare.org/readability/flesch-kincaid-readi...

Gunning Fog: https://www.textcompare.org/readability/gunning-fog-score/

Flesch-Kincaid Grade Level: https://www.textcompare.org/readability/flesch-kincaid-grade...

The Coleman-Liau Index: https://www.textcompare.org/readability/coleman-liau-index

The SMOG Index: https://www.textcompare.org/readability/smog-index/

Automated Readability Index: https://www.textcompare.org/readability/automated-readabilit...

Linsear Write Formula : https://www.textcompare.org/readability/linsear-write/

The site actually seems to have quite a few different methods available, if you look at the footer.

This might actually help me with some of the writing in my own blog posts and such, to check whether any paragraphs don't get too convoluted.

Oh, also there's this site, which attempts to show you the particular sentences that might be hard to read: https://hemingwayapp.com/