Youtube Subtitle AI Translation - powered by Free AI models 2026
Extension Actions
Real-time subtitle translation for YouTube videos with the help of free custom AI models
Youtube Subtitle AI Translation adds real-time AI-powered subtitle translation to any YouTube video that has subtitle available.
FEATURES
• Real-time streaming translation — see results as they generate, no waiting
• Works with any OpenAI-compatible API: OpenAI, Gemini, DeepSeek, and more
• Free built-in tier — no API key needed to get started
• 40+ target languages supported
• Fully customizable display: font size, color, opacity, and position
• Smart preloading — translates the next window 30 seconds early for seamless playback
• Google Translate fallback when AI is unavailable
• Zero data collection — all settings stored locally in your browser
SUPPORTED MODELS
Use the free built-in tier out of the box, or bring your own API key for:
- Any OpenAI-compatible endpoint
- OpenAI chatGPT
- Google Gemini
- DeepSeek
- etc.
SUPPORT LANGUAGES
- English
- Japanese
- Korean
- Spanish
- French
- German
- Portuguese
- Russian
- Arabic
- Hindi
- Thai
- Vietnamese
- Indonesian
- Chinese
PRIVACY
No accounts. No tracking. No analytics. Your API keys and preferences are stored only in your browser's local storage and never transmitted to our servers. See our full privacy policy at https://ycct-intro.pages.dev/privacy.html