Their tag line is "Understand what you read."
Rewordify.com is powerful, free, online software that improves reading, learning, and teaching. This site can:
Rewordify is free online software that facilitates reading, learning and teaching. The principle function of this software rewords text that is complicated or difficult to read into simpler language. Users simply paste the difficult text into an online box and click the “Rewordify text” button. The software may be used by anyone who is having difficulty reading complex text, or by teachers to create learning materials such as vocabulary lists and quizzes.
The software may be used without registration, however more features are offered to those who opt to obtain a free registration (December 11, 2017). Those options include storing, editing, sharing, and deleting documents, along with saving vocabulary quizzes. Registered users can also customize the way the software’s highlighting works.