For anyone wanting to roll this themselves, it's actually quite easy with Chrome media capture these days. Just make a Chrome extension with desktopCapture perm

For anyone wanting to roll this themselves, it's actually quite easy with Chrome media capture these days. Just make a Chrome extension with desktopCapture permissions, follow the example codes to do things like chooseDesktopMedia and webkitGetUserMedia and let them choose the desktop (or tab). You can do what you want w/ the media stream after that (like capture to blobs which you can send around, or send over WebRTC or whatever). I have even successfully captured a tab to video [0] 0 - https://github.com/cretz/chrome-screen-rec-poc/tree/master/attempt1 https://github.com/cretz/chrome-screen-rec-poc/tree/master/a... Edit: I should say screen capture, screen sharing is a different deal of course.