Beta Available Now

BSL signing from
any screen caption

A Chrome extension that detects live captions on YouTube, BBC iPlayer, Netflix and more - and translates them into BSL signing in real time.

Screen captions→Text to glosses→BSL signing overlay

Chrome only · Manual install (Load Unpacked) · Free · No account required

Install in 3 steps

Download & unzip

Click "Download Beta" above. Unzip the folder anywhere on your computer.

Open Chrome Extensions

Go to chrome://extensions - enable Developer Mode (toggle top-right).

Load Unpacked

Click "Load Unpacked" and select the unzipped signlytic-extension folder. The Signlytic icon appears in your toolbar.

Automatically detects live captions from YouTube, BBC iPlayer, Netflix, Amazon Prime and more. Falls back to microphone when captions are off.

Converts English captions to BSL glosses using the same translation engine powering the Signlytic AI application.

Floating panel with 2D skeleton or 3D avatar signing each gloss in sequence. Draggable, resizable, always on top.

Supported Platforms

YouTube

BBC iPlayer

Netflix

Amazon Prime

All4

Disney+

Rendering

Two signing modes

Lightweight stick-figure animation using MediaPipe pose landmarks. Runs in browser Canvas with minimal resources.

Full 3D Mixamo avatar driven by pose landmarks via Three.js. More expressive with finger-level detail.

This is an early beta - your feedback shapes what gets built next.