languagetool
LanguageTool is an AI-based writing assistant and grammar checker that detects grammar, spelling, punctuation, style, and casing errors across 30+ languages and offers an AI paraphrasing tool, editor, browser add-ons, desktop apps, and integrations for business and personal use.
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Quick Overview
Best for: Content & Marketing
What it does
Writing & Text software for decision-makers comparing workflow fit and alternatives.
Best fit
Content & Marketing
Pricing snapshot
Freemium from Not specified on page (free tier available)
Next step
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languagetool
LanguageTool is an AI-based writing assistant and grammar checker designed for both personal and professional use. It checks grammar, spelling, punctuation, style, and casing across more than 30 languages and dialects, and offers an AI-powered paraphrasing tool to rewrite sentences in different tones (formal, fluent, simple, concise).
LanguageTool is available as a web editor, browser add-ons (Chrome, Firefox, Edge, Safari, Opera), desktop apps for macOS and Windows, office plugins (Google Docs, Microsoft Word, Apple Pages, LibreOffice), and e-mail add-ons (Gmail, Outlook, Apple Mail, Thunderbird). It offers free and Premium plans, team/business accounts with GDPR-conform solutions, and a Proofreading API for integrations.
AI-powered grammar and style checker for over 30 languages, including rephrasing.
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Claim this listing for $29Key Features
Grammar & Spell Checking
Detects grammar mistakes, spelling errors, incorrect subject–verb agreement, wrong plural forms, and casing issues; underlines mistakes and offers correction suggestions.
Punctuation & Style Suggestions
Finds and corrects punctuation issues (commas, dashes, hyphens), detects overused phrases, redundant words, foreign terms, and improper word choice to improve style.
AI Paraphrasing Tool
An AI-based paraphraser that can rephrase sentences to be more formal, fluent, simple, or concise; enables unlimited paraphrasing for Premium users.
Multilingual Support
Checks text in more than 30 languages and dialects, including English, German, Spanish, French, Dutch, and Portuguese, with varieties for English (US, UK, Canada, Australia, New Zealand, South Africa).
Editor & Personal Tools
Web editor with distraction-free writing, personal dictionary, and statistics to track writing productivity and errors.
Browser Add-ons & Integrations
Browser extensions provide live suggestions while typing across the web and automatically detect the language; the browser add-on does not store text.
Office & App Plugins
Plugins and apps for Google Docs, Microsoft Word (Word 2016 or later / Office 365), Apple Pages, LibreOffice, macOS and Windows apps that integrate suggestions into common writing tools.
Team & Business Features
GDPR-conform solutions and team accounts to ensure consistent brand voice and error-free communication for organizations.
Statistics & Productivity Tracking
Tracks languages used, errors made, suggestions applied, and other metrics to help users monitor and improve their writing.
Pricing
Free version corrects spelling as well as simple punctuation and some style mistakes.
Free
Not specified on page (free tier available)- Corrects spelling, simple punctuation, and some style mistakes
Premium
Not specified on page (promoted with a limited-time -20% discount)- Shows all errors and advanced suggestions
- Unlimited paraphrasing and additional premium features
- Picky Mode for advanced punctuation, style, and typography
Teams / Business
Not specified on page- GDPR-conform solutions
- Team accounts for companies
Use Cases
Everyday writing and emails
Live grammar and style suggestions while composing emails, social posts, and web content via browser add-ons and e-mail plugins.
Academic writing and thesis proofreading
Helps students and academics check dissertations, essays, and theses for errors and improve style; students get a discount for Premium.
Professional and brand communication
Teams and businesses use GDPR-compliant solutions to maintain consistent, error-free communication and a unified brand voice.
Multilingual content creation
Authors and translators working in multiple languages use LanguageTool to check grammar and style across 30+ languages and dialects.
Rewriting and tone adjustment
Use the AI paraphraser to rephrase sentences for different tones and purposes (more formal, concise, or simpler language).
Integrations
Google Docs
Add-on to check texts in Google Docs for grammar and spelling mistakes.
Microsoft Word
Word add-in that works with Word 2016 or later and Office 365 to check documents.
Apple Pages / macOS apps
LanguageTool for macOS allows checking in Pages, Mail, Slack, Word (Mac), Notes, and Messages.
LibreOffice
Plugin to check text within LibreOffice.
Gmail / Outlook / Apple Mail / Thunderbird
E-mail add-ons to receive grammar and style suggestions while composing emails.
Browser extensions (Chrome, Edge, Firefox, Safari, Opera)
Live suggestions while typing across the web; automatic language detection.
Benefits
Limitations
Frequently Asked Questions
Is LanguageTool a comprehensive grammar checker?
How well does LanguageTool grammar checker detect comma errors?
How does error detection and correction by LanguageTool work?
Which languages can be checked with LanguageTool's grammar checker?
Is LanguageTool free?
Does LanguageTool work on my program?
Is LanguageTool suitable for paraphrasing sentences?
Can LanguageTool help me correct a bachelor or master thesis?
Getting Started
- 1 Step 1: Create a free account on the LanguageTool editor (Sign Up).
- 2 Step 2: Paste text or start typing in the web editor to receive automatic suggestions.
- 3 Step 3: Install the browser add-on, desktop app, or office plugin for in-app checks (Chrome, Firefox, Edge, Safari, Opera; Word, Google Docs, LibreOffice, macOS/Windows apps).
Support
docs
Help Center and product documentation accessible from the website (Help link / Help Center).
blog
Product updates, tips, and company information available via the LanguageTool blog linked from the site.
website
Main website includes editor, account support, and links to apps, add-ons, and business solutions.
API
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