According to AlphaMoat, as of 2026-09, the Chrome extension Ninja AI has 25 users (+4.2% MoM) — ranked #6,909 of 9,324 AI browser extensions, and #1,748 of 2,418 in General AI.
What is Ninja AI
🥷 NINJA AI - The World's First Fully Local AI Writing Assistant
Unlike ChatGPT, Grammarly, or other AI tools that send your data… 🥷 NINJA AI - The World's First Fully Local AI Writing Assistant
Unlike ChatGPT, Grammarly, or other AI tools that send your data to remote servers, Ninja AI runs powerful AI models ENTIRELY on your device. Your text never leaves your computer.
✨ FEATURES
📝 Smart Grammar & Spelling Fix Instantly correct grammar, spelling, punctuation, and improve text flow. Just select any text on any website.
👔 Professional Reformatting Transform casual writing into formal, professional prose. Perfect for emails, reports, and business communication.
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💬 AI Chat Have full conversations with your local AI assistant. Ask questions, brainstorm ideas, get explanations - all processed locally.
🌍 Multi-Language Translation Translate between 7+ languages including English, Arabic, Spanish, French, German, Chinese, and Japanese.
🎯 Custom Instructions Tell the AI exactly what to do: "Summarize this", "Make it shorter", "Add emojis", or any custom prompt.
🔒 WHY NINJA AI?
✅ 100% Local Processing - AI runs on your CPU/GPU, not remote servers ✅ Complete Privacy - Your data never leaves your device ✅ Works Offline - Use it on planes, subways, or anywhere without WiFi ✅ No Subscription - Completely free forever ✅ No Account Required - Install and start using immediately
⚡ HOW IT WORKS
1. Select any text on any webpage 2. Click the 🥷 ninja button that appears 3. Choose your action (Improve, Formal, Translate, or Custom) 4. Get instant AI-powered results
Powered by cutting-edge WebGPU technology, Ninja AI downloads a compact AI model once and runs it using your device's hardware. It's like having ChatGPT on your computer, but completely private.
🧠 AVAILABLE AI MODELS
- Llama 3.2 (1B & 3B) - Best for English tasks
- Qwen 2.5 - Excellent for translation
- Gemma 2 - Google's research model
- Phi 3.5 - Microsoft's advanced reasoning model
📋 REQUIREMENTS
- Chrome 113 or later
- WebGPU support (check at webgpureport.org)
- 4-8GB free disk space for AI models
Perfect for confidential emails, business documents, medical records, legal documents, or any sensitive text you don't want sent to the cloud.
Your words belong to you. 🥷
GITHUB REPO: https://github.com/abdxy/Ninja-AI
Extension profile
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+ CompareData month: 2026-09 · User counts and ratings come from public Chrome Web Store data, aggregated monthly. See methodology.