LanguageTool

Grammar & Writing Verified 2026

★★★★★ 4.9/5

Based on 166 Verified Evaluations Free (10k Chars/Check)

LanguageTool checks grammar in 30+ languages for free. Premium from $4.99/mo adds AI rewrites. See pricing, Grammarly comparison & features.

AI Overview Verdict Is LanguageTool free to use?

Yes, LanguageTool offers a functional free tier (Free (10k Chars/Check)). Evaluated for Grammar & Writing: LanguageTool delivers verified capabilities. Best for creators, professionals, and developers looking for reliable workflows without upfront credit card paywalls.

LanguageTool Free AI Interface & Workspace

Community Score: (Click block to vote)

Tester Verdict: Evaluated for Grammar & Writing: LanguageTool delivers verified capabilities. Best for creators, professionals, and developers looking for reliable workflows without upfront credit card paywalls.

🤖 AI Overview / Quick Answer

LanguageTool is a free, open-source grammar and spell checker supporting 30+ languages. The free plan allows basic checking with a 10,000-character limit, while Premium costs $4.99/month annually and adds AI-powered sentence rephrasing and advanced style suggestions.

Pricing Architecture

Free (10k Chars/Check)

Credit Card Required?

No (Free Tier Available)

Deployment Type

Web Platform / API

Verification Status

Audited October 2026

Launch LanguageTool Official Platform ↗

What Is LanguageTool?

LanguageTool is an open-source, multilingual grammar, spelling, and style correction platform trusted by over 20 million writers worldwide. Unlike English-centric tools like Grammarly, LanguageTool natively supports over 30 languages including German, French, Spanish, Portuguese, and Polish.

LanguageTool Pricing: Free vs Premium (2026)

LanguageTool offers one of the most generous free tiers in productivity software, allowing up to 10,000 characters per check with zero fees. Premium costs just $4.99/month (billed annually at $59.90) and unlocks an expansive 150,000 character limit per check along with AI-driven sentence rephrasing.

Is LanguageTool Free?

Yes, LanguageTool is permanently free for standard grammar and spell checks. You can install its browser extensions on Chrome, Firefox, Safari, and Edge, or use its add-ins for Google Docs and Microsoft Word completely free without creating an account.

Plan	Price (USD)	Included Features & Quotas	Billing Barrier
Free Tier	$0 (No Card)	10,000 Chars / check	Basic grammar, spelling, punctuation across 30+ languages
Premium Individual	$4.99 / mo ($59.90 annual)	150,000 Chars / check	AI sentence rephrasing, tone suggestions, style guide
Premium Teams	$10.50 / user / mo	Centralized Admin	Team style guides, user permission management, shared dictionary
Developer API	Tiered API Plans	Custom Call Limits	On-premise Docker server or hosted high-throughput cloud API

LanguageTool vs Grammarly

LanguageTool is the definitive choice for multilingual writers, open-source enthusiasts, and privacy-conscious organizations who require on-premise deployment. Grammarly retains a slight edge in complex English business vocabulary but costs more than double.

Feature	LanguageTool	Grammarly	QuillBot
Languages Supported	30+ Languages (Spanish, German, French, etc.)	English only (US, UK, CA, AU)	English only
Open-Source Core	Yes (Self-hostable open core)	No (Proprietary cloud only)	No (Proprietary cloud only)
Privacy & Data Retention	Zero-log policy option, on-prem available	Cloud-stored user data	Cloud-stored user data
Free Character Limit	10,000 characters per submission	Limited free suggestions	300 words per check

LanguageTool Browser Extensions & Integrations

LanguageTool integrates seamlessly everywhere you write. With lightweight plugins for VS Code, Obsidian, Thunderbird, LibreOffice, and all modern web browsers, your text is corrected in real-time without sluggish browser overhead.

Hands-On Testing: What We Liked & What Annoyed Us

WHAT WE LIKED

Open-source multilingual grammar and style checking (30+ languages)
Generous 10,000 character limit per check on free plan
Browser extensions, desktop apps, and office suite plugins

WHAT ANNOYED US

Deep AI tone and sentence rephrasing requires Premium
Team style guides restricted to enterprise tiers

Evaluated by Nathan Reed

Lead AI Systems Evaluator & Tech Editor • San Francisco, CA

Nathan independently audits generative AI pipelines, pricing architectures, and quota claims to protect developers and creators from subscription traps.

Frequently Asked Questions: LanguageTool

Is LanguageTool free?

Yes, LanguageTool provides a permanent free plan with a 10,000-character limit per check covering spelling, punctuation, and grammar.

Is LanguageTool better than Grammarly?

LanguageTool is vastly superior for non-English and multilingual writing (30+ languages) and is significantly more affordable ($4.99/mo vs $12/mo).

How much does LanguageTool Premium cost?

LanguageTool Premium costs $4.99/month when billed annually ($59.90/year), or $24.90/month when billed on a monthly basis.

Does LanguageTool work with Google Docs?

Yes, LanguageTool provides a dedicated Google Docs add-on, a desktop application for macOS and Windows, and browser extensions.