Browser Source

Browser Source Captions for OBS

Real-time captions delivered as an OBS browser source. No plugin to install, no model to download, no CPU cost. Just one URL — captions on your stream in 60 seconds.

Try Free for 6 Hours → See pricing

Why "browser source" is the right way to do captions

OBS Browser Source is a built-in feature (since 2017). It loads any web page into your OBS canvas as a layer — same way you'd add a PNG overlay or webcam.

Doing captions via browser source means: no plugin install, no compatibility issues with OBS updates, no CPU cost on your machine. The captions render in our cloud, OBS just displays the result.

How browser source captions work

Sign up at /control — first 6 hours free
Set your audio source language and target caption language
Copy the unique browser source URL
In OBS: Sources → + → Browser Source → paste URL → set 1920x1080
Start streaming — captions appear on your video

The browser source maintains a WebSocket connection to our backend. As you speak, audio is captured by our control panel (separate browser tab), transcribed in our cloud, and sent to your OBS browser source for display.

Browser source advantages over plugins

Zero install — no .exe, no .deb, no DLL
OBS-update-proof — Browser Source spec is stable since 2017
Cross-platform — same URL works on Windows, Mac, Linux OBS
No GPU cost — transcription runs in our cloud, not your GPU
No model downloads — 30+ languages, all available immediately
Easy to disable — just toggle the source visibility off

Common OBS browser source caption questions

Does it work in Streamlabs OBS? Yes — Browser Source is identical.
What about OBS forks like StreamUP, AzkOBS? All OBS-based forks support Browser Source.
Does it work with Twitch Studio? Twitch Studio has Browser Source — yes.
Will the captions slow down OBS? Browser Source has been performance-optimized for years. Captions are lightweight HTML — minimal impact.

Frequently asked

Are browser source captions reliable for production streaming?

Yes. We've handled tens of thousands of streaming hours. Browser Source captions are production-grade. Many partner-tier streamers use them.

Can I customize browser source captions?

Yes — font size, color, outline, position, font family, all customizable in real time via /control.

Do browser source captions cost more CPU?

Minimal. Browser Source rendering is GPU-accelerated in OBS. Captions are lightweight HTML/CSS, no significant cost.

Will browser source captions work in OBS recordings?

Yes. If you record OBS output, captions are baked into the recording video.

How does this compare to OBS plugin captions?

Browser source = cloud-based, zero CPU cost, no install. Plugin = local processing, heavy CPU/GPU cost, install required, OBS update fragility. Full comparison.