LanguageTool

LanguageTool is an AI writing assistant and multilingual grammar checker for improving existing text. It flags spelling, grammar, punctuation, style, tone, word choice, and typography issues, then offers explanations or rewrites. Use the web editor, browser add-ons, desktop and mobile apps, office integrations, or proofreading API across more than 30 languages.

✨ Key Features

• Grammar and spelling checking — Paste text or type in the editor to find agreement errors, typos, word order issues, and incorrect usage.
• Punctuation and style review — Get suggestions for punctuation, casing, wordiness, repetition, overused phrases, and unclear wording.
• AI paraphrasing — Rephrase sentences or paragraphs as more formal, fluent, simple, or concise text while retaining the intended meaning.
• Multilingual support — Check more than 30 languages and dialects, including several English variants.
• Browser assistance — Use Chrome, Edge, Firefox, Safari, or Opera add-ons for suggestions in web apps; the official site says browser add-on text is usually not stored.
• Editor and document workflow — Use the web, Windows, or macOS editor, personal dictionary, style guide, writing statistics, and Word document import.
• Office and email integrations — Work in Google Docs, Microsoft Word, LibreOffice, Apple Pages, Gmail, Apple Mail, Outlook beta, or Thunderbird where supported.
• Premium, teams, and API — Premium raises the text-field limit to 150,000 characters and adds deeper checks and unlimited paraphrasing; team accounts add shared style tools, while the proofreading API adds checking to custom apps.

💳 Pricing

• Basic / Free — Free access to spelling, basic punctuation, and some style suggestions. The Premium comparison page lists a 2,000-character text-field limit and up to three AI sentence rephrasings per day.
• Premium — Individual subscription with monthly, quarterly, annual, and two-year payment intervals. Benefits include up to 150,000 characters per text field, advanced checks, unlimited AI paraphrasing, and a personal style guide. The official page did not render reliable current prices during this review; confirm live checkout price, VAT, and currency.
• Teams — Premium benefits plus user management, team style guide, and team dictionary. The current page did not render a reliable price; confirm the live quote.
• Business / Proofreading API — Organization and API offerings with pricing based on the requested setup or API usage; contact LanguageTool for a current quote.

The official Premium page states a 14-day money-back guarantee. The free paraphrasing page says basic users are limited to three paraphrases per day while Premium includes unlimited paraphrasing in six languages.

⚖️ Alternatives Compared

🎯 Use Cases

• Email and workplace communication — Check messages in Gmail, Outlook, or desktop apps before sending.
• Academic writing — Review essays, dissertations, or reports for grammar, wording, style, and consistency.
• Multilingual editing — Polish supported languages and switch language variants for international readers.
• Content publishing — Check articles, newsletters, and web copy before publication.
• Brand consistency — Use personal or team style guides and dictionaries to standardize terminology.
• Creative rewriting — Change a sentence to a formal, fluent, simple, or concise version while retaining its idea.
• Product integration — Add proofreading suggestions to a custom editor through the API.

LanguageTool is an editing assistant, not a guarantee of factual accuracy. Review suggestions and confirm privacy, retention, language support, plan limits, and API terms for sensitive or commercial content.