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Try BigBlueButton via HTML5

Join a demo session on this server.

New to BigBlueButton? Watch these videos.

Try BigBlueButton via Flash

Join a demo session on this server.

New to BigBlueButton? Watch these videos.

BigBlueButton HTML5 client test server

BigBlueButton is an open source web conferencing system for on-line learning. This is a public test server for the BigBlueButton HTML5 client currently under development.

We welcome your feedback on this developer build of the HTML5 client. It's under very active development, so if you don't see a feature you want just yet, check back again soon.

For Developers

The BigBlueButton project is supported by a community of developers that care about good design and a streamlined user experience.

See API examples for how to integrate BigBlueButton with your project.


Record and Playback

BigBlueButton can record your sessions for later playback by students.


The whiteboard controls let you annotate key parts of your presentation.

Desktop Sharing

You can broadcast your desktop for all users to see (requires lastest version of Java for presenter only).

WebRTC Audio

Users of Chrome and FireFox browsers will benefit from high-quality, low-latency WebRTC audio. (Users of other browsers will seamlessly use Flash-based audio.)


You can upload any PDF presentation or MS office document. BigBlueButton keeps everyone in sync with your current slide, zoom, pan, annotations, and mouse pointer.

Web Cam

Multiple users can share their webcam at the same time. There is no built-in limit on the number of simultaneously active webcams.


Students can raise hand and use emoji icons for feedback.


You can poll students anytime to increase engagement.


You can interact with students through public and private chat.

Live Captioning

You can enter live captions for students. These captions will later appear as subtitles in recordings.

Breakout Rooms

You can group and place students into breakout rooms (full BigBlueButton sessions) for give number of minutes for increased collaboration.

Screen Reader

Students with visual disabilities can use JAWS screen reader to interact with BigBlueButton.