Flying Comment Translate AI

Display YouTube live chat like 'Flying Comments' with AI translation and summarization.

Flying Comment Translate AI is a Chrome extension that translates YouTube Live chat in real-time using Google Gemini AI and displays them as flowing comment overlays on the video screen. It also works as a simple flowing comment display even without the translation feature. This extension sends chat comments to Google's servers for AI translation and renders them directly in your browser — no comment server is used, and comments are placed at random positions on screen. Comments are batched and translated together — up to 25 comments are collected over 5 seconds, then translated all at once for efficiency. 🚀 Key Features ■ Flowing Comment Overlay Enjoy streams and comments simultaneously without moving your eyes. Customize font size, opacity, and flow speed with simple controls. ■ AI Translation (Slang-Aware) Powered by Gemini 2.5 Flash-Lite / Flash. Translates internet slang and casual expressions naturally — e.g., "草" → "lol", "ニキ" → "bro". ■ Speed-Based Summary Automatically summarizes when chat gets too fast, so you never miss key reactions. 💳 How to Use (2 Options) ① Patreon Membership (Recommended) No API key setup required. Just log in with Patreon. | Plan | Price | Limit/month | Est. Viewing Time | |---------|--------|---------------|-------------------| | Free | $0 | 240 reqs | ~20 min | | Starter | $5 | 12,000 reqs | ~17 hrs | | Standard| $10 | 26,000 reqs | ~36 hrs | | Pro | $20 | 64,000 reqs | ~89 hrs | | Ultra | $35 | 140,000 reqs | ~194 hrs | * Enabling summary may reduce viewing time by ~10-20%. * If you upgrade your plan, please log out and log in again to sync. ② Use Your Own API Key Get a free API key from Google AI Studio (aistudio.google.com). ⚠️ IMPORTANT: We strongly recommend Gemini 2.5 Flash-Lite. Flash and Pro models are expensive and can generate charges of hundreds of dollars quickly. ⚙️ Settings Configure via the extension popup button or the Advanced Settings page. - API Request Interval: Adjust translation frequency (1s - 10s slider) - Cost Saver: Set min/max comment length to optimize API usage - Display: Font size, opacity, flow speed, text/translation colors - Preview: See your display settings in real-time ⚠️ Disclaimer - This extension is an unofficial tool developed by an individual - AI translation accuracy is not guaranteed - When using your own API key: treat it like a credit card — never share it publicly - API usage may be subject to Google Cloud quota limits 📢 Important Notice Regarding API Request Limits This service provides translations via Google's latest AI (Gemini 2.5 Flash-Lite) through API. We strive to deliver a stable service, but please be aware of the following: Possible Temporary Limits: A rapid increase in members or concentrated access during certain time periods may cause the AI model's "maximum requests per minute" quota to be reached. Behavior During Limits: When the quota is reached, translation and summarization may be temporarily skipped — comments will appear in their original language, or display may be delayed. Resolution: When quota limits are reached, we will promptly request a quota increase from Google. However, Google's review and implementation may take several days to weeks. Refund Policy: Temporary service quality reductions caused by infrastructure-level constraints as described above are not eligible for refunds. 🔒 Data Handling [When using Patreon Membership] Translation requests are processed through the developer's Cloudflare Worker proxy. Session token and usage count are stored for plan management. No personal information is stored. [When using your own API Key] All data is processed directly between your browser and Google's servers. Your API key and chat data are NEVER sent to the developer or any third party. We welcome your feedback to continue improving this extension!