Esplain — Easy Explain

Understand any text on the web with AI-powered explanations.

## Short Description (132 chars max)
Select text → click 💡 → get AI-powered explanations with context. Features depth control, markdown formatting, and text-to-speech.

## Detailed Description

**EsPlain — Easy Explain** helps you understand any text on the web with AI-powered explanations.

### How It Works
1. Select any text on any webpage
2. Click the 💡 lightbulb icon that appears
3. Get an instant AI explanation in a beautiful modal

### Key Features

**🎯 Smart Context-Aware Explanations**
- Automatically extracts surrounding text for better understanding
- Focuses on your selected term while using context for clarity
- Works with technical terms, acronyms, concepts, and more

**📊 Configurable Explanation Depth**
- Quick (~150 words) - Fast, simple explanations
- Standard (~300 words) - Balanced detail
- In-Depth (~500 words) - Comprehensive coverage
- "Explain More" button for 400 additional words with structured formatting

**🎨 Beautiful User Interface**
- Compact lightbulb icon (non-intrusive)
- Modern modal with gradient header and smooth animations
- Markdown rendering for deeper explanations (headings, lists, code blocks)
- Clean, professional design

**🔊 Text-to-Speech (Dual Options)**
- Free: Browser's built-in Web Speech API (instant, zero cost)
- Premium: High-quality OpenAI TTS voices (cached for efficiency)
- Both options with stop/resume controls

**⚙️ Fully Configurable**
- Choose from multiple OpenAI models (GPT-4o, GPT-4 Turbo, GPT-3.5)
- Adjust explanation depth to your needs
- Enable/disable extension with one click

**💰 Cost-Effective**
- Smart context extraction (~400 chars, not entire page)
- Configurable depth settings to control API usage
- Audio caching for premium TTS (no duplicate API calls)
- Character limits to prevent runaway costs

### Privacy & Security
- Your OpenAI API key is stored locally in your browser
- No data is sent to our servers
- Direct communication with OpenAI API
- Open source code available on GitHub

### Requirements
- OpenAI API key (get one at platform.openai.com)
- Active internet connection
- Chrome browser (Manifest V3)

### Perfect For
- Students learning new concepts
- Researchers reading technical papers
- Non-native speakers understanding complex text
- Anyone curious about unfamiliar terms or phrases
- Developers reading documentation

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**Note:** This extension requires an OpenAI API key. API usage costs are paid directly to OpenAI based on your usage. Typical cost per explanation: $0.0001-0.001 depending on depth setting.