LanguageTool is a multilingual spelling and grammar checker that uses both rule-based approaches and artificial intelligence (AI) to detect and fix errors and typos. LanguageTool’s AI-based analyses can detect and fix advanced errors and generate rephrased sentences to help writers improve their writing. The AI technology can analyze the style, tonality, and typography of a text to provide more thorough and advanced corrections. LanguageTool is available in more than 30 languages and dialects, including English, Spanish, German, French, Dutch, and Portuguese.
The free version of LanguageTool corrects spelling, simple punctuation, and some style mistakes, while the Premium version offers advanced grammar, punctuation, and style checks, as well as additional features such as gender checking in personal names and support for longer texts. LanguageTool can be used in all common internet browsers and has a dedicated text editor app for iOS, macOS, and Windows. The AI-powered paraphraser feature of LanguageTool can help writers rewrite their sentences to be more fluent, formal, or shorter. The paraphraser is available to all users, but Premium users have access to an unlimited number of rephrased sentences.