Transmitting live subtitles for Zoom webinars or meetings

FAB Subtitler LIVE can transmit live subtitles for Zoom webinars or meetings. Zoom provides an interface which is used by FAB Subtitler LIVE to send live subtitles over HTTP(S).

Configuration of FAB Subtitler LIVE

Before you can transmit subtitles to Zoom, you will require the Zoom Caption URL:

  • You can find the Zoom Caption URL by opening your current or scheduled Zoom meeting
  • Click the Closed Caption icon (CC) and select the “Copy the API token” button
  • You will require this URL when configuring the FAB Subtitler Live


To use the Zoom live captioning functionality with the FAB Subtitler LIVE, create a new output device:

  • Open Options > System > Network and add the Zoom live captioning output device FAB Subtitler Zoom

  • Paste the Zoom Caption URL and save the configuration FAB Subtitler Zoom

Testing the transmission and configuring the Zoom client

To confirm whether the subtitles are transmitted correctly, we suggest creating a test Zoom meeting and transmitting the subtitles from FAB Subtitler Live.

  • Open the Zoom meeting
  • Click on the Closed Caption (CC) icon and select Show Subtitle:

Zoom show CC

To make the font size of the Zoom closed captions larger:

  • Click the Closed Caption icon and select Subtitle Settings

Zoom cc font settings

To start the test transmission open the FAB Subtitler Live and start sending subtitles:

  • For an easy and fast way to send subtitles, we suggest using the Speech interface
  • Please note: For the subtitles to be sent from the Speech interface, select “ON AIR” before sending them:

FAB Live Subtitler - ON AIR