LanguageTool

Check grammar, spelling, punctuation, and style across more than 30 languages.

languagetool.org

About

LanguageTool checks text for grammar, spelling, punctuation, casing, and style issues. It also includes a paraphrasing tool and can suggest a tone for your writing.

Use the editor, browser add-on, desktop apps, or integrations for tools such as Google Docs, Microsoft Word, and LibreOffice. The editor offers text storage, a personal dictionary, writing statistics, and additional suggestions with Picky Mode.