LanguageTool
AI grammar and style checker with paraphrasing, available across browsers, email, office apps and as an API.
What it does
LanguageTool is an AI-based grammar, spelling and style checker with a paraphrasing tool. It works in the browser, email clients, office suites and mobile apps, offers a Premium tier, and provides GDPR-conformant business and API options.
Core features
Grammar and spelling checking
Style and tone suggestions
Paraphrasing tool
Browser, email and office add-ons
Proofreading API
Business/GDPR-conformant options
Best for
→Proofread and correct writing
→Rephrase sentences
→Maintain consistent tone across a team
Toolspool rankingby monthly traffic
Reviews
Big-picture takes: what it's for and whether it delivers. High-engagement YouTube videos — not sponsored.