AI grammar, spelling and style checker for over 30 languages
LanguageTool is an AI tool. LanguageTool checks grammar, spelling, punctuation and style in more than 30 languages, with a web editor, browser extensions, desktop apps and Word and LibreOffice add-ins. A free tier covers basics; Premium unlocks the full rule set and an AI paraphrasing tool.
LanguageTool is an AI-based proofreading assistant that checks text for spelling, grammar, punctuation, casing and style problems. The core workflow is simple: paste a passage into the web editor or keep typing, and corrections appear as colored underlines with suggestion cards while you write. A double-click on any word opens a synonym list. The underlying engine covers more than 30 languages and dialects, including Arabic, Chinese, Japanese, Polish, Russian and Ukrainian alongside the main European languages, and the English version lets writers pick among six regional varieties (US, UK, Canada, Australia, New Zealand and South Africa). The same checking engine travels with you. A browser add-on detects the language of whatever you type in web forms, email clients and social feeds and flags issues inline, without storing the text. Desktop apps put the checker inside Windows programs such as Outlook, Wordpad and Notepad, and inside Mac apps including Pages, Mail, Slack and Notes. There are also add-ins for Microsoft Word (2016 or later, Office 365) and LibreOffice, plus a Google Docs route through the browser extension. When correction is not enough, an AI paraphraser rewrites whole sentences in a more formal, fluent, simple or concise register, which is where LanguageTool overlaps with dedicated rewriting tools. The tool suits students working on essays and theses, journalists, non-native speakers writing in a second language, and teams that need consistent copy across long documents. Free accounts add a distraction-free editor, a personal dictionary, dark and light themes, and statistics that track errors, languages used and suggestions accepted over time. Picky Mode adds deeper checks for advanced punctuation, style and typography. Organizations such as the European Union, Spiegel and dpa are cited as users. Against Grammarly and similar assistants, LanguageTool leans harder on multilingual coverage and regional variants, while its free tier handles spelling, basic punctuation and some style issues. Full error coverage, deeper style rules and the paraphraser sit behind the Premium tier, and company team accounts are offered separately.
Two versions are offered. The free version corrects spelling plus simple punctuation and some style mistakes. The Premium version reveals all errors and adds the full feature set, and team accounts for companies are available separately. Exact prices are not stated on the homepage.
Learn moreBrowser extensions for Chrome, Firefox, Edge, Safari, Opera and Yandex; desktop apps for Windows and macOS; a Microsoft Word add-in (Word 2016 or later, Office 365); LibreOffice; and a Google Docs route via the browser add-on.
Learn moreSpelling, grammar, punctuation and casing checks with style suggestions for overused phrases, foreign terms and redundant words. Also includes an AI paraphraser, Picky Mode for advanced punctuation and typography, a personal dictionary, writing statistics, dark and light themes, and secure storage of texts in the editor.
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