hearsub

What is hearsub

HearSub is a Chrome extension designed for YouTube foreign-language videos. It generates real-time bilingual subtitles and AI-powered native-speaker dubbing, translating content as the video plays without requiring the entire video to be uploaded.

How to use hearsub

1. Install the HearSub extension from the Chrome Web Store or Firefox Add-ons.
2. Open a YouTube video in a supported browser (Chrome, Edge, Brave, or Firefox).
3. The extension automatically detects the video's language and generates translated subtitles and AI dubbing in real time.
4. Adjust settings as needed to view bilingual subtitles or listen to the AI voiceover.

Features of hearsub

• Real-time subtitle translation
• Bilingual subtitle display
• Synchronized AI dubbing
• Multi-speaker recognition
• Preserves original background audio
• Supports 42 dubbing languages, including English, Chinese, Japanese, Korean, Spanish, Portuguese, French, German, Russian, Arabic, Hindi, Indonesian, and Ukrainian
• Works with any source language (auto-detected)
• Buffers translations ahead of playback to minimize impact on video speed

Use Cases of hearsub

• Watching YouTube videos in a foreign language with real-time translated subtitles
• Listening to AI dubbing in your native language while watching foreign content
• Learning a new language by comparing original audio with translated subtitles
• Enjoying videos without needing to read subtitles, thanks to AI voiceover

Pricing

HearSub is currently free for personal use with no usage limits. If optional paid features are introduced in the future, users will be notified in advance.