GrammarHelper — Grammar & Spell Checker

選択テキストを右クリックしてLanguageToolで文法・スペルを確認。修正候補をワンクリック適用。EN/JA/DE/FR/ES他多言語対応。無料・APIキー不要。

GrammarHelper adds grammar and spell-checking to any text field on any website, powered by the open-source LanguageTool engine. Right-click selected text to run a grammar check, see suggestions highlighted inline, and apply corrections with one click. **Key Features:** - Grammar, spelling, and style suggestions via LanguageTool API - Right-click context menu: "Check grammar" on any selection - Inline error highlighting with suggested corrections - Supports 30+ languages including English (US/UK/AU), German, French, Spanish, and Japanese - Explanation of each error with a "Why is this wrong?" tooltip - Works in Gmail, Google Docs, Notion, Twitter, and any text field - Toggle on/off without uninstalling **Who is it for?** Non-native English speakers writing professional emails or documents, writers and bloggers who want a quick grammar check outside of Google Docs or Word, professionals who write in multiple languages, and anyone who wants a grammar checker that works across all websites. **Privacy & Trust:** Selected text is sent to LanguageTool's API for grammar analysis. LanguageTool's privacy policy applies: https://languagetool.org/legal/privacy/. No text is stored or sold. Install GrammarHelper — better writing, everywhere.