MemexNG - Semantic History Search

About

# MemexNG — Semantic History Search

Find anything you've ever read.

MemexNG brings AI-powered semantic search to your browsing history — completely private and fully local. Instead of searching with exact keywords or digging through bookmarks, simply describe what you remember and MemexNG finds it instantly.

Search your browsing history the way you think.

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## 🔍 Semantic Search

Find pages by meaning, not exact words.

Examples:
• "that article about AI privacy risks"
• "React authentication tutorial"
• "video about local LLMs"
• "CSS animation performance guide"

MemexNG uses on-device AI embeddings to understand the meaning behind your searches and retrieve the most relevant pages you've visited.

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## 🧠 Ask Questions About What You've Read

Use natural language to search and summarize information from your browsing history.

MemexNG can:
• retrieve relevant pages
• surface matching excerpts
• provide cited answers from your indexed content
• help you rediscover forgotten research

Every answer includes clickable source references.

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## ⚡ Fast & Lightweight

• Instant popup search
• Fast vector search powered by HNSW indexing
• Optimized for large browsing histories
• Smooth scrolling and responsive UI
• Works entirely on-device

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## 🔒 100% Private

MemexNG is built with a local-first architecture.

Your browsing data:
• never leaves your device
• is never uploaded to servers
• is never shared with third parties
• is never used for analytics or tracking

After the initial AI model download, MemexNG works completely offline.

No accounts.
No telemetry.
No cloud sync.
No tracking.

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## 🏷️ Features

✓ Semantic browsing history search
✓ AI-powered natural language queries
✓ Local vector search index
✓ Dark / light / system theme
✓ Reading list and annotations
✓ Omnibox search support
✓ Domain filtering and relevance controls
✓ Indexed page statistics
✓ Configurable privacy controls
✓ Fully local IndexedDB storage

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## 🚀 Built For

• Developers
• Researchers
• Students
• Writers
• AI power users
• Privacy-conscious users

Anyone who constantly reads online and wants to find information again instantly.

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## 🛡 Permissions Explained

MemexNG requires browser permissions to index pages locally and enable semantic search.

• <all_urls> — allows page content extraction for indexing
• storage / unlimitedStorage — stores your local search index
• activeTab — reads the current page when indexing
• history — optional browsing history indexing
• offscreen — runs AI embedding generation efficiently

All processing happens locally on your device.

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## 🧩 Open Source

MemexNG is open source and privacy-focused. You can inspect the code, verify behavior, and contribute to development.

Built with modern local AI technologies including:
• Transformers.js
• ONNX Runtime Web
• Mozilla Readability
• Voy vector search
• React + TypeScript

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MemexNG — Your History, Augmented.