LanguageTool is an AI-driven grammar, spelling, and style checker and paraphraser that supports over 30 languages and dialects. It corrects common errors in written documents, fixes punctuation, confirms casing, and offers tips for text improvement. It can integrate with various office programs, and is available across platforms including Windows, macOS, and iOS. LanguageTool offers a free basic version and a premium version providing access to advanced features. The tool is trusted by more than 2000 organizations.