Hemingway is an online word editor that lets you analyze the readability of your content. It also tells you the changes you should make to your content to make it more readable by telling you which sentence needs what kind of fix. Grammarly also does the same with its paid version. The added advantage of Grammarly’s paid version is that it also verifies the originality of the content with its plagiarism checker.
Check it out here https://hemingwayapp.com/