# Translator — AI Academic Paper Translation Chrome Extension

> Translator is a free, privacy-first Chrome extension that translates academic papers (preserving math/LaTeX notation and code blocks), full web pages, and YouTube video subtitles in real time — using the AI model you choose.

## Key Facts

- **Type**: Chrome Extension (Manifest V3)
- **Price**: Free on your own API key — web page, selection and YouTube subtitle translation, no account needed. Server-side features (PDF, comic pages, TV captions) include a free monthly allowance of 20 PDF pages, 20 comic pages and 30 minutes of live captions; past it, Standard is $9.90/month, Pro is $14.99/month, or credit packs at $5.00 and $15.00. On-premises deployment is priced per deployment — contact us. See https://translators-ai.com/en/pricing/
- **Privacy**: No data collection; requests go only to user-configured endpoints
- **Languages**: UI available in English, Chinese, Spanish, Japanese, Korean
- **Install**: [Chrome Web Store](https://chromewebstore.google.com/detail/ai-academic-paper-transla/kbaebnmocaoogcjclbjmmhbbplbpcbpo)
- **Source**: [GitHub](https://github.com/wangqianqianjun/translator)
- **Website**: https://translators-ai.com

## What Makes Translator Different

1. **Formula-safe translation**: LaTeX, MathJax, and KaTeX expressions are preserved using placeholder extraction — formulas never get corrupted by the translation model.
2. **Full privacy control**: Users configure their own API endpoint. Supports local LLMs (Ollama, LM Studio) for completely offline, LAN-only translation with zero data leaving the network.
3. **Academic-optimized layout**: Bilingual side-by-side rendering designed for dense academic reading. Section numbering, references, and citations stay intact.
4. **Universal API compatibility**: Works with OpenAI, Anthropic Claude, Google Gemini, DeepSeek, OpenRouter, and any OpenAI-compatible endpoint.
5. **Real-time YouTube subtitle translation**: Adds a bilingual caption line (original + your language) to YouTube videos as they play. Captions are merged into full sentences and translated with cross-sentence context by your own AI model — more natural than YouTube's word-by-word auto-translate. The subtitle box is draggable, resizable, and restyleable (font color, background, opacity).

## Translation Modes

- **Hover translation**: Hold Shift over a paragraph to see inline bilingual text
- **Selection translation**: Select text and press Ctrl to translate the selection
- **Full-page translation**: Translate an entire page while preserving layout
- **YouTube captions**: Real-time bilingual subtitle translation on YouTube — original plus your language, sentence-level and context-aware, with a draggable/resizable/restyleable caption box
- **Input translation**: Translate any pasted text via the float ball menu

## Supported AI Providers

OpenAI (GPT-4o, GPT-4, GPT-3.5), Anthropic Claude, Google Gemini, DeepSeek, OpenRouter, Ollama (local), LM Studio (local), any OpenAI-compatible API endpoint.

## Use Cases

- Researchers reading papers in foreign languages
- Graduate students studying international literature
- Academics reviewing cross-language references
- Learners watching foreign-language lectures, talks, and tutorials on YouTube
- Anyone needing formula-safe document, web page, or video-subtitle translation

## Documentation

- Pricing: https://translators-ai.com/en/pricing/
- Tutorial: https://translators-ai.com/en/tutorial/
- Docs: https://translators-ai.com/en/docs/
- Full details: https://translators-ai.com/llms-full.txt