HearSub
Real-time YouTube subtitle translation and AI dubbing for natural viewing and listening
About HearSub
HearSub provides subtitle retrieval, real-time translation, and an AI dubbing experience for YouTube videos. It captures the complete transcript as a foundation for later processing, translates only the subtitle lines near the player in real time, and prepares target-language audio in advance to reduce waiting. It supports learning, work, and information-seeking scenarios, helping users watch and listen in their own language. The official page also states that videos do not need to be uploaded and emphasizes privacy, lightness, and efficiency.
Best for
Best use cases
Watch YouTube videos in your own language
View real-time subtitle translations while learning
Get cross-language video information at work
Listen to video content in the target language
Features
Complete transcript retrieval
Captures the complete transcript as a foundation for subsequent subtitle processing.
Real-time subtitle translation
Translates only the subtitle lines near the player and updates them in real time during playback.
Target-language audio buffering
Prepares target-language audio in advance to reduce playback waiting.
Privacy protection
The official page states that videos do not need to be uploaded and emphasizes privacy protection.
Pros
- Free for personal use with no usage limit
- Subtitle translation and dubbing stay synchronized with playback
- No video upload required, with a focus on privacy
- Lightweight and efficient