LanguageTool is an open-source grammar, style, and spell checker trusted by over 6 million browser extension users, supporting 30+ languages with real-time corrections across every platform you write on.

LanguageTool's Core Features

• Grammar, spelling, punctuation, and style checking across 30+ languages
• Advanced Picky Mode for detecting subtle stylistic issues and redundant phrases
• AI-powered paraphrasing tool for rewording sentences in formal, informal, or fluent styles
• Browser extension for Chrome, Firefox, Safari, and Edge
• Microsoft Word, Google Docs, and LibreOffice integrations
• Personal dictionary for adding custom terms and brand names
• Consistency checker for capitalization, hyphenation, and number formatting
• Translation between 10+ languages without copy-pasting
• Team plan with centralized billing for up to 20 users
• API access for developers integrating LanguageTool into their own apps

LanguageTool's Use Cases

1. Multilingual writers and ESL professionals can use LanguageTool to check writing in over 30 languages including Spanish, French, German, and Portuguese.
2. Academics and researchers can use LanguageTool to catch subtle grammar and style errors in theses, papers, and reports before submission.
3. Businesses can use the Team plan to enforce writing consistency across departments with a shared style profile and centralized billing.
4. Developers can use the LanguageTool API to integrate real-time grammar checking into their own writing tools and platforms.
5. Bloggers and content creators can use the browser extension to proofread writing directly in WordPress, Medium, Gmail, and social media without switching apps.