languagetool-org/languagetool
Style and Grammar Checker for 25+ Languages
⚡ Executive Summary & Quick Facts
Authoritative Sourcelanguagetool is languagetool is an open-source project written in Java: Style and Grammar Checker for 25+ Languages.. It provides a free, self-hosted open-source alternative to Grammarly.
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of October 2026), languagetool-org/languagetool has accumulated 15,194 GitHub stars and 1,592 forks. It is written in Java, licensed under LGPL-2.1, and ranks #1,032 globally. It is actively maintained with the latest commit recorded on Oct 25, 2026.”
| Repository | languagetool-org/languagetool ↗ |
|---|---|
| Primary Category | grammar |
| Language & Stack | Java |
| Software License | LGPL-2.1 |
| Community Traction | ★ 15.2K stars · ⑂ 1.6K forks · #1,032 globally |
| Maintenance | ● Active (Last commit: Oct 25, 2026) · 2,155 open issues |
| Replaces SaaS | Open Source Grammarly Alternative ($12–$15/month per user) → |
| Target Audience | Developers and engineering teams building with Java, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 90/100 · Grade AYes, languagetool is actively maintained. Continuous telemetry recorded the last code commit on Oct 25, 2026 (5 days ago). Supported by 15,194 stars and 1,592 community forks, this repository holds a calculated health index of 90/100, reflecting very active (commits within last 14 days) and high open issue volume (2,155 open).
Star History
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+99
STARS · LAST 30 DAYS
3
PER DAY
#54
MOST-STARRED Java
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +11 | +99 | +270 |
| Per day | 2 | 3 | 3 |
| Forks gained | +2 | +8 | +80 |
languagetool gained 99 stars in the last 30 days, about 3 a day, and now has 15.2K. It is about 13 years old and has averaged roughly 1.2K stars a year. It ranks #54 among Java repositories and #1,032 across all languages on GitHubRepo.
Trending Record
34
DAYS ON TRENDING
#526
BEST RANK
Sep 24, 2026
FIRST APPEARANCE
Active
STATUS TODAY
languagetool has maintained a continuous presence across global trending indexes, peaking at #526. Below is the 30-day activity profile:
💡 Overview
languagetool is an open-source project written in Java: Style and Grammar Checker for 25+ Languages.
Engineered for speed, consistency, and developer ease, it solves common hurdles in grammar, natural-language, natural-language-processing. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in Java for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/languagetool-org/languagetool.git
cd languagetool⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
JDK 17 or higher (OpenJDK / GraalVM)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
languagetool coordinates its core functionality through a modular Java pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Production System Integration
Embed languagetool into Java backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open LGPL-2.1 license.
🚀 Getting Started
Install languagetool using your package manager: `git clone https://github.com/languagetool-org/languagetool.git`
Initialize your project workspace or configuration file for languagetool.
Import languagetool into your codebase or invoke it directly from your terminal.
Execute your test suite or run `languagetool --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Java, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
languagetool-org/languagetool is currently ranked #1,032 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #1,027 | librespeed/speedtest | JavaScript | ★ 15.2K | Compare ↗ |
| #1,028 | VSCodeVim/Vim | TypeScript | ★ 15.2K | Compare ↗ |
| #1,029 | dogecoin/dogecoin | C++ | ★ 15.2K | Compare ↗ |
| #1,030 | TanStack/router | TypeScript | ★ 15.2K | Compare ↗ |
| #1,030 | CoplayDev/unity-mcp | C# | ★ 15.2K | Compare ↗ |
| #1,032 | languagetool-org/languagetool This Project | Java | ★ 15.2K | |
| #1,032 | lynx-family/lynx | C++ | ★ 15.2K | Compare ↗ |
| #1,034 | Nuitka/Nuitka | Python | ★ 15.2K | Compare ↗ |
| #1,035 | keycastr/keycastr | Objective-C | ★ 15.2K | Compare ↗ |
| #1,036 | liketrek/TREK | TypeScript | ★ 15.1K | Compare ↗ |
| #1,037 | prowler-cloud/prowler | Python | ★ 15.1K | Compare ↗ |
Frequently Asked Questions
What does languagetool do? +
Style and Grammar Checker for 25+ Languages
Is languagetool actively maintained in 2026? +
Yes, languagetool is actively maintained. The latest code push was recorded on Oct 25, 2026 (5 days ago). It holds a calculated Maintenance Health Score of 90/100 (A rating) with 15,194 stars and 2,155 open issues.
What language is languagetool written in? +
The primary language is Java. Topics include: grammar, natural-language, natural-language-processing, proofreading, spellcheck.
How many stars does languagetool have? +
languagetool has 15,194 stars and 1,592 forks on GitHub.
How does languagetool rank among GitHub repositories? +
With 15,194 stars, languagetool-org/languagetool is ranked #1,032 globally across all repositories tracked on GitHubRepo and #54 among Java projects.
What license is languagetool distributed under? +
The repository reports a LGPL-2.1 license. Always verify the repository LICENSE file for legal terms.
