hearsub
Browser extension for real-time YouTube subtitle translation and AI dubbing
Introduction
hearsub is a browser extension that translates YouTube captions as you watch and adds synchronized AI dubbing. It supports bilingual captions and multiple speakers, keeps the original background audio, and does not need the full video uploaded.
- Added on
- Nov 2, 2026
- Website
- hearsub.ai
- Pricing model
- Free
- Company
- HearSub
Product information
What is hearsub?
HearSub is a browser extension that offers real-time YouTube subtitle translation, bilingual captions and synchronized AI dubbing. It follows playback, so you do not upload the whole video.
How to use hearsub?
Install the extension, open a foreign-language YouTube video, pick your target language and start playback. HearSub detects the source language and keeps captions and dubbing in sync.
Core features of hearsub
- Real-time translated captions
- Bilingual subtitle display
- Synchronized AI dubbing
- Multi-speaker detection
- Keeps original background audio
- 42 dubbing languages
Use cases of hearsub
- 1Follow online courses in another language
- 2Watch coding tutorials in your preferred language
- 3Understand interviews and long conversations
- 4Keep up with international business news
- 5Watch foreign-language Shorts
Frequently asked questions about hearsub
Which browsers does HearSub support?+
It supports Chrome, Edge and Brave, and a Firefox version is also available.
Does HearSub download the full video?+
No. It follows playback and generates captions and dubbing without downloading or uploading the full video.
How much does HearSub cost?+
It is currently free for personal use with no usage cap; any paid features are to be announced in advance.
Which category is hearsub in?+
hearsub is listed under AI Dubbing & Subtitles.
Tags
ai video translatorai dubbingsubtitlesbrowser extensionhearsub alternatives
Browser extension that translates and reads aloud foreign-language subtitles on YouTube and other sites.