Here's website that can help you fix mechanics, diction (including passive voice!), and syntax. Remember: it's only offering suggestions (and it's a computer, so it doesn't think like a human). You should still choose to do what you think is best. Also, it won't find every mistake; you still have to rely on yourself. Happy writing! Hemingway Writing App
Even though it's called an app, you don't have to download it. You can copy and paste right into it on the web by clicking the "write" button, eliminating the sample text, and putting in your own. Then click "edit."
There's a link (Writing Helper) on the "links" column to the right for future use.
