On Facebook, are you a grumpy know-it-all who disagrees with people, or an extrovert who lets everyone know what you’re up to? If you’re not sure, don’t fret – a web tool now lets you see just what your status updates reveal about your personality. The intuitive site analyses words from your posts to show you what sort of person you are, and then compares your traits with friends and celebrities. The tool is called Five Labs and predicts users’ personalities based on their Facebook posts. It was built as a demonstration of how today’s public social networks can analyse user content, according to the company.