Lockstep

Relay online

Watch together, in sync.

A Chrome extension for watch parties on Netflix, YouTube, Prime Video, Hotstar and any site with a normal video player. Everyone's playback stays within a few hundredths of a second, with chat alongside.

Download Lockstep

Install (once)

  1. Unzip the download. You get a folder called lockstep.
  2. Open chrome://extensions and switch on Developer mode (top right).
  3. Click Load unpacked and choose the lockstep folder.
  4. Pin it: click the puzzle icon in the toolbar, then the pin next to Lockstep.

Start a party

  1. Open the video you want to watch.
  2. Click the Lockstep icon, then Start party. The invite link is copied.
  3. Send the link. Friends who open it land on the same video, in sync.

Open source. The relay only sees play, pause and seek events, chat, and the address of the video page. Nothing is stored.