OwlyCheck is a free add-on for Chrome that serves as a real-time spell and grammar checker, powered by LanguageTool. It provides users with the ability to write emails, messages, and documents without spelling or grammatical errors. The tool highlights mistakes in red and offers intelligent suggestions for corrections with a simple click, making writing smoother and more efficient.

Supporting multiple languages including Spanish, English, and Catalan, OwlyCheck automatically detects the language being used. Its lightweight nature ensures no registration or subscription fees are required, allowing users to start writing immediately. Privacy is also a key feature, as the service processes data anonymously and does not store any text or browsing history, ensuring a secure writing experience.