FindexAI — Your "Ctrl + F" on steroids

FindexAI transforms the humble browser-search shortcut into a full-blown, AI-powered discovery engine. Whether you're scouring a long article, diving into YouTube transcripts, or hunting down a fact on the live web, FindexAI brings the power of LangChain agents, vector search, and a seamless browser extension right to your fingertips.

Core Capabilities

• Instant AI Chat Sidebar - Triggered by your favorite shortcut (e.g. Ctrl + Shift + F)
• Multi-Agent Architecture:

Web-search agent (SearchXNG) for real-time, up-to-date answers
YouTube agent that pulls video transcripts and context
HTML-page agent that converts on-page content into Markdown for deep querying
• Vector-based Similarity Search (FAISS) for lightning-fast retrieval of previously indexed content
• Model-agnostic Backend - Plug in OpenAI, Anthropic, local LLMs, or your own API keys
• Chat History & User Authentication - SQLite-powered persistence (coming soon)
• Fully Modular Architecture - FastAPI backend and React-based browser extension (Chrome & Firefox)
Live Demo - Try our reactive agent at findex.tashif.codes/chat

Why FindexAI?

• Beyond Simple Text-Matching - Semantic search means you can ask "What did the author say about supply chains?" even if the exact phrase never appears
• Multi-Source Intelligence - Combine web search, video transcripts, and in-page context in a single conversation
• Privacy & Key-Friendly - Bring your own API key (BYOK), store it locally, or swap models on the fly
• Developer-Friendly - Open architecture lets you extend agents, swap vector stores, or even run entirely client-side with LangChain.js • Live Demo Available - Try our reactive agent at findex.tashif.codes/chat and explore our landing page

Technical Architecture

Backend (FastAPI + LangChain)

Agentic Workflow - Orchestrating ReAct, search, vector DB lookups, YouTube and HTML agents
FAISS Vector Store - For embeddings and similarity search
ChromaDB Integration - Advanced vector database for semantic search
LangChain & LangGraph - Powerful agent orchestration and workflow management
SQLite Database - For user data, chat history & config (planned)
Modular Design - Model-agnostic architecture for easy integration of new LLMs
API Endpoints - /ask, /video-info, /subs, /website, /crawller, /health

Frontend (React + WebExtension APIs)

Shortcut Listener - Hijack or augment Ctrl + F
Sidebar UI - Injected into any page for live chat and answer insertion
YouTube UI Injection - Chat icon overlays player, video ID auto-extracted
LocalStorage - For API keys, theme settings, and model choices
Theme Engine - MacOS Classic, Ocean Dark/Light, Windows XP, Neobrutal, and more
React Framework Rearchitecture - Modern React-based extension with improved performance and maintainability

Extension Features

Fixed Find Tool - Powerful DOM search (Ctrl+Shift+F)
Page Search Tool - Enhanced in-page search (Ctrl+F)
Sidebar Chat - AI-powered Q&A interface
Theme Support - Multiple UI themes (XP, macOS, Neobrutal, Nintendo, etc.)

Documentation

Live Documentation - Complete API reference, architecture details, and usage guides
Self-Hosting Guide - Docker setup and deployment instructions

Installation & Setup

Backend (FastAPI)

Install dependencies:

cd backend
pip install -r requirements.txt

Run the backend server:
```
uvicorn app.main:app --reload
```
Configure API keys:
- Set up your LLM API keys in environment variables
- See backend/app/core/config.py for configuration details

Frontend (Landing Page)

Install dependencies:
```
cd landing_page
npm install
```
Run the development server:
```
npm run dev
```
Open http://localhost:3000 in your browser

Extension (Chrome/Firefox)

Build the extension:
```
cd extension
npm install
npm run build
```
Install in browser:
- Go to chrome://extensions/ (or Firefox Add-ons)
- Enable "Developer mode"
- Click "Load unpacked"
- Select the extension/dist folder

Themes & Customization

Pick your vibe—whether it's glassy, brutalist, classic MacOS, or even Nintendo '95—FindexAI's theme engine lets you search in style.

Available Themes:

✅ MacOS Classic
✅ Neobrutal
✅ Ocean Dark
✅ Ocean Light
✅ Material UI
✅ Cream
✅ Nintendo
✅ Windows XP
✅ Orange Dark
✅ Orange Light
✅ Google 1995
⏳ Liquid Glass (coming soon)

Project Status

Backend

Frontend

Extension

Contributors

Tashif Ahmad Khan - Backend Developer, Designer and Frontend Website
Harleen Kaur - GenAI Shaurya - Web Extension Saarthak - Web Extension

Contributing

We welcome contributions! To get started:

Fork the repository and clone it locally
Set up the backend and frontend as described above
Create a new branch for your feature or bugfix
Submit a pull request with a clear description of your changes

License

This project is licensed under the MIT License. See the LICENSE file for details.

Roadmap

Upcoming Features

BYOK (Bring Your Own Keys) support
More theme options
Mobile extension support
Advanced chat history features
Documentations Craller (like the tailwind docs and all)
Document upload (pdf, docx, txt, md) file RAG and agent

FindexAI - Making search smarter, faster, and more contextual.