Japanese Audio to English Subtitles

About

Japanese Audio to English Subtitles — Real-Time Translation

Watch Japanese videos, streams, and anime with live English subtitles. This extension captures audio from your browser tab, transcribes Japanese speech using OpenAI Whisper, and translates it to English using GPT — all in real-time.

✦ Features:
• Real-time Japanese speech recognition and English translation
• Draggable subtitle overlay — position it anywhere on screen
• Adjustable subtitle size (16px to 48px)
• Shows both English translation and original Japanese text
• Works on any website — YouTube, Crunchyroll, Twitch, NicoNico, and more
• Choose between GPT-4o Mini (fast & cheap) or GPT-4o (higher quality)

✦ How to use:
1. Click the extension icon
2. Enter your OpenAI API key (get one at platform.openai.com)
3. Navigate to a page with Japanese audio
4. Click "Start" — subtitles will appear at the bottom of the page
5. Drag the subtitle bubble to reposition it anywhere

✦ Requirements:
• An OpenAI API key (you bring your own key — no subscription to us)
• Audio must be playing in the browser tab

✦ Privacy:
• Your API key is stored locally on your device only
• Audio is sent directly to OpenAI's API for processing
• No data is collected or stored by this extension