What is LanguageTool?
LanguageTool is an AI‑based grammar, spelling, and style checker that supports more than 30 languages and dialects, including English, German, French, Spanish, Dutch, and Portuguese. It offers browser extensions for Chrome, Edge, Firefox, Safari, and Opera, enabling real‑time corrections while typing in e‑mail, blog posts, or social media.
A dedicated desktop application and a Microsoft Word add‑in provide offline editing for Word, Google Docs, LibreOffice, and other office suites. LanguageTool’s “Picky Mode” adds advanced punctuation, tone, and synonym suggestions for users who need detailed style refinement.
The tool also includes a paraphrasing function that rewrites sentences in a formal or concise style, useful for academic writing, business communication, and creative projects. Developers can integrate the service via an API, facilitating automated grammar checks in custom applications.
LanguageTool pricing Free
Verify on the official pricing page.
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Based on 16 reviews, 81.3% of users recommend LanguageTool, rated highly for ease of use.
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LanguageTool's key features
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Grammar and style checking (30+ languages)
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Unlimited AI sentence paraphrasing
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Custom style guide creation
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Browser add‑on for web writing
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Team management with shared guide
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150,000 character text limit
LanguageTool use cases
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Edit multilingual academic papers in real time using LanguageTool's browser extension, ensuring accurate grammar and style without switching applications
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Automate email proofreading in multiple languages with LanguageTool's Word add‑in, catching typos and suggesting formal tone for professional communication
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Build a custom grammar‑checking microservice for a multilingual SaaS platform by integrating LanguageTool's API, providing instant feedback on user-generated content
Who is it for?
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Content creators
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E-commerce sellers
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Product designers
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Strategic leaders
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Digital marketers
