LanguageTool

LanguageTool is a proofreading service available online that assists in checking grammar and spelling errors in more than 30 languages. It provides a wide range of features suitable for both casual and professional use, including an AI-based grammar checker, a personal dictionary, text quality scoring, and more. It offers browser add-ons for popular browsers like Chrome, Edge, Firefox, Safari, and Opera, as well as Office plugins for Google Docs, Word, OpenOffice, and LibreOffice. Additionally, it provides desktop apps for macOS and Windows, E-Mail add-ons for Gmail, Outlook, Apple Mail, and Thunderbird, and Editor Apps for iOS, macOS, and Windows. Premium users can also benefit from a rephrasing tool, advanced punctuation suggestions through Picky Mode, and style and typography recommendations. LanguageTool is highly regarded and trusted by renowned organizations such as BMW Group, Amazon, RingCentral, European Union, Spiegel Magazine, Deutsche Presse-Agentur (dpa), Heise, Bertelsmann Stiftung, Schweizer Radio und Fernsehen (SRF), JetBrains, IP Australia, and Wirtschaftsuniversität Wien. It is free to use, and there is also a 20% discount available for the Premium version.