Powerful writing can’t always be appreciated by a machine. But there are plenty of online tools that can help you avoid common mistakes and craft content that’s easy to understand.

Hemingway is one of the most useful. Paste your content into the page and Hemingway will:

• Flag sentences that are tricky to read
• Warn when you’re using passive voice
• Suggest ways to simplify your language
• Identify opportunities to use more specific verbs

It’s important to take Hemingway’s advice with a pinch of salt. It won’t help you maintain a certain tone of voice and it doesn’t have any way to know who your writing is aimed at.

However, it’s one of the most effective ways I’ve found to sanity check articles, blogs posts and other content. File it alongside spelling and grammar checkers as another useful tool to tighten up your writing.