LanguageTool

LanguageTool is an open-source proofreading tool that checks text for grammar and spelling mistakes, as well as style improvements, in multiple languages. Users can use it via the web interface, browser extensions, or add-ins for word processors.

When text is entered or written in LanguageTool’s environment, the AI-driven engine scans for errors like subject-verb agreement issues, typos, incorrect punctuation, or inconsistent capitalization. It underlines potential issues and offers suggestions to correct them.

For style and clarity, LanguageTool also gives recommendations, such as avoiding passive voice or replacing repetitive words. It supports dozens of languages, making it a valuable resource for non-native speakers or multilingual users. With both free and premium versions, LanguageTool caters to everyone from casual writers to professionals seeking an extra layer of editing to ensure their writing is polished and error-free.