Generate live captions in 125+ languages for your stream. StreamTranslate AI caption generator uses our industry-leading speech AI and delivers captions via OBS browser source — instantly, from the moment you go live.
Generate Live Captions NowThe caption generation pipeline in StreamTranslate starts with your microphone. When you go live, StreamTranslate begins capturing your audio input continuously. That audio is streamed to our industry-leading speech AI in real time — not batched, not delayed, but sent as a live audio stream — and enterprise speech AI returns transcription results within milliseconds of receiving each audio segment.
Those transcription results become the raw material for caption generation. StreamTranslate formats the enterprise speech AI output into properly punctuated, readable caption text, applies line-breaking logic to keep captions readable on screen, and pushes the formatted captions to your OBS browser source. The entire pipeline — from microphone to caption on screen — typically completes in under 500 milliseconds.
The 125-language generation layer sits between transcription and display. After enterprise speech AI generates your English transcription, StreamTranslate passes that text through a real-time translation model that generates equivalent captions in every target language you have configured. Spanish viewers, Japanese viewers, and Portuguese viewers all get their own caption stream generated simultaneously, all from the same source audio. Set up your caption generator in under five minutes.
Captions appear on your stream within 500 milliseconds of when you speak. Fast enough that viewers read along in real time, not catching up after the fact.
Generate captions in 125+ languages simultaneously from a single audio source. One stream, global audience.
Control font size, colors, background opacity, and position via OBS browser source settings. Make captions look exactly how you want them.
Generated captions are only useful if they are displayed in a way that works for your specific stream layout. StreamTranslate gives you meaningful customization options so your captions complement your stream design rather than clashing with it. Font size, text color, background transparency, and caption positioning are all configurable — and since the captions are delivered as an OBS browser source, you also get OBS built-in transform controls for fine-grained sizing and positioning.
Most streamers position captions at the bottom of the screen in a semi-transparent black bar, keeping them out of the way of the game content while remaining easily readable. Others prefer a minimal no-background style that lets game content show through. StreamTranslate supports both approaches and anything in between.
For streamers running multiple language caption streams, the OBS browser source can be duplicated with different language configurations, allowing you to display captions in multiple languages simultaneously — English and Spanish stacked vertically, for example. The flexibility of the browser source model makes advanced caption setups possible without any custom coding. Check our pricing for the plan that covers your language needs.
StreamTranslate captures your microphone audio, sends it to our industry-leading speech AI for real-time transcription, translates the transcript to your target languages, and delivers the formatted captions via OBS browser source — all within approximately 500 milliseconds.
Yes. StreamTranslate offers customization options for font size, caption colors, background opacity, and position. You can also resize and reposition the browser source within OBS.
StreamTranslate can generate captions in multiple languages simultaneously. See our pricing page for specifics on language limits per plan.
Yes. StreamTranslate supports 125+ source languages. our industry-leading speech AI handles transcription in all supported source languages, with translation available for every language pair.