CaptiPrep

CaptiPrep is an AI-powered tool for English learners that helps you preview key vocabulary and expressions using subtitles before watching YouTube videos. This allows you to watch with a better understanding, following a "learn first, then watch" approach that is efficient and engaging.

**Key Features**

* **Subtitle Preview:** Automatically extracts keywords and phrases from English subtitles.
* **Smart Filtering:** Combines AI pre-screening with manual selection to generate a personalized learning list.
* **One-Click Card Generation:** Automatically creates study cards with definitions, phonetics, example sentences, and notes.
* **Overlay Panel:** Operate directly within the YouTube page without needing to navigate away.
* **Word Notebook:** Saves learning history and favorites, supporting selection, deletion, and export for review.
* **Local Privacy:** API Key and other configurations are stored only on the local options page.

**How to Use**

1. After installing the extension, open a YouTube video with English subtitles.
2. Click the extension icon to open the panel.
3. Extract subtitles → Select words/phrases → Generate cards → Learn.
4. Open the "Word Notebook" from the right-side entry to review and export.

**Settings Instructions**

* Configure your LLM provider, model, and API Key (locally stored) on the "Options Page."
* Currently supports OpenAI, Claude, Gemini, and OpenAI-compatible providers.
* It is recommended to use videos with English subtitles for the best results.

With CaptiPrep, transform "watching videos to learn English" into a planned, reviewable, and context-based efficient learning process.

Multi-language support will be added in the future, allowing people from various countries to learn different languages through CaptiPrep!