Two lines, live
The original speech in white, the translation in amber, updating as people talk. Works on YouTube, Netflix, Disney+ and any HTML5 video.
Understand any video, in two languages at once.
Bilingual Live Captions listens to the tab you pick and shows the original line with its translation right on the video — live, in 78 languages.
What it does
Captions where you want them
Drag and resize the caption box, or move the full history into Chrome’s side panel. Each site remembers its own layout.
Your key, no middleman
Audio goes from your browser straight to the provider you choose, with your own API key. There is no server of ours in between.
Up and running in three steps
- 1
Install
Add the extension from the Chrome Web Store (Chrome 116 or newer).
- 2
Get a Gemini API key
The welcome page walks you through creating a key in Google AI Studio and pasting it in.
- 3
Switch it on
Open a video, click the extension icon, and flip the switch at the top right.
Providers and languages
| Gemini live translate 3.5 | Deepgram Nova-3 + DeepL | |
|---|---|---|
| API keys | One (Google) | Two (Deepgram, DeepL) |
| Languages | 78 | 10 common languages |
| Source language | Detected automatically | You pick it |
| Best for | Simplest setup, widest coverage | Word-by-word source text, tunable line length |
Questions
Does it cost anything?
The extension is free and open source. Speech and translation are billed by the provider you choose, on your own account — check their pricing.
Where is my API key stored?
Only in this Chrome profile’s local storage. It is not synced, web pages cannot read it, and it is only ever sent to the service it belongs to.
Can the developer hear what I watch?
No. The extension has no backend: tab audio goes straight to your provider. Only the text you choose to send through the optional feedback form ever reaches the developer.
Does it caption system audio or other apps?
Not yet. It captures the audio of one Chrome tab at a time.