Youtube Closed Caption Translate - powered by Open and Free AI models 2026

Real-time subtitle translation for YouTube videos with the help of free custom AI models

Youtube CC Translate (YCCT) adds real-time AI-powered subtitle translation to any YouTube video that has captions available. HOW IT WORKS A translate button appears in the YouTube player controls. Click it to start. Translated text appears below the native YouTube captions within seconds, streamed in real-time as the AI generates the response. 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. 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 REQUIREMENTS Only works on YouTube videos that have captions/subtitles available.