"ewordify.com is powerful, free, online reading comprehension and vocabulary development software. It helps people understand difficult English faster, helps them learn words in new ways, and helps teachers create high-interest learning materials from any English text passage.
See the yellow box at the top of the page? Just paste in a difficult English sentence, paragraph, or more, or enter a web page URL and click the button. You'll instantly see an easier version, for fast understanding now. No dictionary needed! Plus, the easier version is specially highlighted to help build vocabulary."