GrammarHelper — Grammar & Spell Checker

About

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.