Data month 2026-09

Grammar Assistant

Name: Grammar Assistant
Rating: 3.7 (3 reviews)

Writing

AI Writing On-Device AI

Free offline AI grammar checker & writing assistant. WebGPU-powered, 100% private. Supports 5 languages. No cloud, no subscription.

Add to Chrome ↗

According to AlphaMoat, as of 2026-09, the Chrome extension Grammar Assistant has 45 users (+12.5% MoM), rated 3.7 (3 reviews) — ranked #5,663 of 9,324 AI browser extensions, and #419 of 744 in Writing.

Users · 2026-09

45+12.5%

Rating

★ 3.73

Overall Rank (9,324)

#5,663

Writing Rank

#419/ 744

What is Grammar Assistant

From the Chrome Web Store

Free offline AI grammar checker & writing assistant. WebGPU-powered, 100% private. Supports 5 languages. No cloud, no subscription. Grammar Assistant is a professional, privacy-first AI writing companion that runs entirely offline in your browser. Powered by WebGPU and advanced local AI models, it corrects grammar, refines style, and extracts text from images—all without sending a single word to external servers.

WHY CHOOSE GRAMMAR ASSISTANT?

100% Private & Offline - Your text never leaves your device. No tracking, no cloud uploads, no data collection.
Free Forever - No subscriptions, no API costs. Runs on open-source local AI models.
WebGPU Accelerated - High-performance grammar checking using your computer's GPU.
Works Everywhere - Context menu, keyboard shortcuts (Cmd/Ctrl+Shift+E), and dedicated side panel.
OCR Text Extraction - Extract and correct text directly from images using built-in OCR technology.

MULTI-LANGUAGE SUPPORT

Optimized for English, Russian, German, Spanish, and French with automatic language detection to ensure accurate corrections in your preferred language.

5 PROFESSIONAL WRITING STYLES

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Standard - Natural, everyday corrections
Formal - Professional business tone
Academic - Scholarly writing with precise language
Simple - Clear, easy-to-read sentences
Casual - Relaxed but polished tone

POWERFUL AI MODELS (YOUR CHOICE)

Select from 5 high-performance local models optimized for grammar correction Models download once to your browser cache (~1-5 GB) and run completely offline afterward.

KEY FEATURES

Smart Correction Workflow:

Real-time AI-powered grammar and style suggestions
Side-by-side diff view showing all changes
Detailed explanations for every correction
One-click copy to clipboard

OCR from Images:

Upload screenshots or photos
Extract text automatically using Tesseract.js
Apply AI corrections to extracted text

Theme Support:

Light, dark, and system-based themes
Persistent preferences across all tabs

Advanced Technology:

Streaming responses for instant feedback
Web Workers for smooth UI performance
Intelligent caching for faster subsequent corrections
Automatic language mismatch detection

HOW TO USE

1. First Launch: Click the extension icon and select your preferred AI model from settings. The model downloads automatically to your browser (one-time setup, ~1-5 GB depending on model).

2. Quick Corrections: Select any text on a webpage → Right-click → Choose "Correct with Grammar Assistant" (or press Cmd/Ctrl+Shift+E).

3. Side Panel Workflow: Open the side panel to type or paste text, select your writing style (Standard, Formal, Academic, Simple, or Casual), and click "Run AI" for instant corrections with detailed explanations.

4. OCR from Images: Open the side panel → Switch to the OCR tab → Upload an image → Extract text → Apply AI corrections.

5. Offline Ready: Once downloaded, models run completely offline—perfect for sensitive documents or working without internet.

PERFECT FOR:

Writers, students, and professionals
Non-native English speakers
Privacy-conscious users
Offline workers and travelers
Anyone who needs fast, accurate grammar checking

Zero data collection. Zero tracking. Zero cloud processing. Your text is processed locally on your device and never transmitted to external servers. Open-source models. No cookies. No telemetry.