This is the Hemingway Editor – an online text editor and copy editor. All you have to do is copy/paste a story into the online Hemingway Editor and it will show you how to improve your work. As you make changes in the editor, watch those highlights disappear. When all is ready, just copy/paste it back to your usual writing app.
The text you see here is the default text you’ll find when you visit the site. It’s also the user guide. Yes, it really is that easy to use. If you find it useful, you can buy the desktop version (Windows or Mac) for $9.99. See details.