# LanguageTool

> Grammar and style checker for more than 30 languages

LanguageTool is a grammar, spelling and style checker that covers more than 30 languages and dialects and includes an AI paraphrasing tool. It works through browser add-ons, office and email plugins, a web editor and apps for Windows, macOS and iOS. It began in 2003 as an open-source project, and its core checking technology is still published as open-source software.

- **Category:** Writing Tools
- **Made by:** LanguageTooler GmbH (since 2003)
- **Website:** https://languagetool.org
- **Runs on:** Web, macOS, Windows, iOS, Browser extension
- **Facts last checked:** Oct 5, 2026

## Pricing

LanguageTool has a free plan. Paid plans start at $4.99 per month on a 2-year plan ($119.80); $69.90 billed annually.

- **Pricing model:** Free plan
- **Free plan:** Basic plan: grammar, punctuation and spelling checks in 30+ languages on up to 2,000 characters per text field, with limited Picky Mode and 3 AI rephrasings a day.
- **Free trial:** None listed.

| Plan | Price | What you get |
| --- | --- | --- |
| Basic | $0 | Grammar, punctuation and spelling checks on up to 2,000 characters per text field, with 3 AI sentence rephrasings a day. |
| Premium | $5.83 per month, billed annually ($69.90); $24.90 billed monthly | Up to 150,000 characters per text field, 20,000+ extra checks, unlimited AI paraphrasing and a personal style guide. Also $49.90 a quarter or $119.80 for 2 years. |
| Teams | $66.40 per user / year, for a team of 2 users | Every Premium feature plus user management, a team style guide and a team dictionary. Sold from 2 users, with a lower per-user price for larger teams. |

Read from https://languagetool.org/premium on Oct 5, 2026. Prices change, so confirm with LanguageTool before buying.

## Ways to pay less

- **Longer billing terms cost less per month** (Annual discount): Premium is $24.90 billed monthly, $49.90 a quarter, $69.90 a year or $119.80 for two years, which works out to about $5.83 and $4.99 a month on the two longest terms. Source: https://languagetool.org/premium
- **Up to 20% off for students and educators** (Education): Students, teachers and professors can claim an educational discount of up to 20% off a Premium subscription. Source: https://languagetool.org/students
- **Team seats priced below individual plans** (Other savings): On Teams, each seat costs less than the $69.90 individual annual price: $66.40 per user for 2 users and $62.91 per user from 10 users. Source: https://languagetool.org/premium
- **Limited-time 20% discount on Premium** (Other savings): The pricing page was advertising a limited-time 20% discount on Premium, with a countdown, when it was checked on 2026-10-05. Source: https://languagetool.org/premium

## Key features

- **Grammar, spelling and style checks:** Checks grammar, punctuation, spelling, casing and style. Premium adds more than 20,000 extra checks for English, German, French, Spanish, Dutch, Polish and Portuguese.
- **AI paraphrasing:** Rephrases a sentence to be more formal, more fluid or shorter. Basic accounts get 3 rephrasings a day and Premium removes the limit.
- **Long-text checking:** Premium checks up to 150,000 characters per text field, against 2,000 on the Basic plan.
- **Style guide and dictionaries:** Custom rules enforce consistent wording. Teams share a style guide and a dictionary of approved terms, with admins deciding who can add to them.
- **Add-ons and apps:** Browser add-ons for Chrome, Edge, Firefox, Safari and Opera, plugins for Google Docs, Word, Apple Pages and LibreOffice, email add-ons, and apps for Windows, macOS and iOS.
- **Open-source core and API:** The core checker is open source, with code on GitHub, and users can set up their own LanguageTool server. A hosted Proofreading API accepts up to 60,000 characters per request.

## Good for

- People who write in several languages, not only English
- LibreOffice, Thunderbird and Apple Pages users who want a checker add-on
- Developers who need a proofreading API or a checker they can host themselves

## Worth knowing

- The free Basic plan checks 2,000 characters per text field and allows 3 AI rephrasings a day.
- There is no free trial of Premium; LanguageTool offers a 14-day money-back guarantee instead.
- Monthly billing is $24.90, more than four times the per-month cost of the annual plan.
- Apps are listed for Windows, macOS and iOS; no Android app appears on the site.

## Works with

Google Docs, Microsoft Word, Gmail, LibreOffice, Thunderbird, Apple Mail, Apple Pages, Outlook

**Tags:** Grammar & style, AI features, Open source, Self-hostable, Public API

## Alternatives

- [Grammarly](https://toolgpa.com/tools/grammarly): Writing assistant for grammar, tone and rewrites in any app. [Compare](https://toolgpa.com/compare/grammarly-vs-languagetool)
- [QuillBot](https://toolgpa.com/tools/quillbot): AI paraphraser with grammar, summarizing and AI-detection tools. [Compare](https://toolgpa.com/compare/languagetool-vs-quillbot)
- [ProWritingAid](https://toolgpa.com/tools/prowritingaid): Grammar, style and story-critique toolkit for book writers. [Compare](https://toolgpa.com/compare/languagetool-vs-prowritingaid)
- [DeepL Write](https://toolgpa.com/tools/deepl-write): AI writing assistant for corrections, rephrasing and tone. [Compare](https://toolgpa.com/compare/deepl-write-vs-languagetool)
- [Antidote](https://toolgpa.com/tools/antidote): Grammar corrector, dictionaries and language guides in one. [Compare](https://toolgpa.com/compare/antidote-vs-languagetool)

## Sources

The prices, plans, platforms and features above were read from these pages on Oct 5, 2026:

- https://languagetool.org/premium
- https://languagetool.org
- https://languagetool.org/students
- https://languagetool.org/business
- https://languagetool.org/proofreading-api
- https://languagetool.org/about
- https://languagetool.org/legal/

Page: https://toolgpa.com/tools/languagetool
Listed by ToolGPA (toolgpa.com).