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Online Captioning Tool — No Download Required

StreamTranslate is 100% browser-based. No download, no install — open, connect your mic, and caption live in 125+ languages. Powered by our industry-leading speech AI in the cloud, delivered via OBS browser source.

Start Captioning in Your Browser

Why Online Beats Desktop for Live Captioning

Desktop captioning tools made sense when internet connections were slow and cloud processing was expensive. In 2026, the calculus has flipped entirely. Cloud-based ASR models like our industry-leading speech AI are more accurate than anything you can run locally on a gaming PC, process audio faster than local models, and receive continuous accuracy improvements without requiring you to update any software.

For streamers, the practical benefit of an online captioning tool is significant. Live streaming already puts enormous pressure on your CPU and GPU — you are running a game, encoding video in real-time, and managing OBS scenes simultaneously. Adding a local ASR process on top of that competes for CPU resources that your encoder needs. Moving captioning to the cloud eliminates that competition entirely. StreamTranslate processes your audio on advanced AI infrastructure, not yours.

The OBS browser source integration bridges cloud captioning and your stream. StreamTranslate gives you a browser source URL. Paste it into OBS as a browser source, position it where you want captions to appear, and the cloud-processed captions show up in your OBS scene in real time with no local processing overhead.

Zero Installation

Nothing to download, nothing to install, no software updates. Open StreamTranslate in any browser and start captioning immediately.

Cloud Performance

our industry-leading speech AI processes your audio in the cloud. No CPU or RAM impact on your streaming PC — keep those resources for your game and encoder.

OBS Browser Source

One URL, pasted into OBS as a browser source. Your cloud captions appear as a native OBS overlay without any desktop captioning software.

125 Languages, All Online

The cloud-based architecture makes multilingual captioning possible in a way that no desktop tool could match. Running transcription and translation for 125+ languages locally would require more computing power than any gaming PC has available. StreamTranslate handles all of it remotely: our industry-leading speech AI transcribes your audio in real time, the translation pipeline converts that text to your target languages, and the results are pushed to your OBS browser source within seconds.

This means you can go live in English and have simultaneous captions in Spanish, French, German, Japanese, Korean, Portuguese, and dozens of other languages — all without any additional hardware, any additional software, or any meaningful increase in your stream technical complexity. The entire pipeline runs online.

For streamers trying to reach international audiences, this is transformative. Every stream becomes accessible to 125+ language communities. Streamers using StreamTranslate consistently report new viewers from countries they were previously invisible in. See how easy the setup is and check our pricing for plans that fit your schedule.

Frequently Asked Questions

Is StreamTranslate really 100% browser-based?

Yes. StreamTranslate runs entirely in the cloud. Nothing to download or install, and our industry-leading speech AI processing happens on our servers — not your machine.

What are the advantages of an online captioning tool vs a desktop app?

Online tools do not consume your CPU or RAM, work on any operating system, update automatically, and can be accessed from any machine. Keeping captioning in the cloud frees up CPU for your game and encoder.

Does the online tool work with OBS?

Yes. StreamTranslate delivers captions via a browser source URL. Paste it into OBS as a browser source and your cloud-processed captions appear as an overlay on your stream.

What languages can I caption in with the online tool?

StreamTranslate supports 125+ languages for both transcription and translation. All processed in the cloud via our industry-leading speech AI.