Watch reaction videos
in perfect sync.

A Chrome extension that plays a reaction video in sync with your own copy of the show or film, each in its own tab. Pause, skip, seek: the other one follows.

Get Started

How it works

01
Select your tabs

Open the episode and the reaction video in two separate browser tabs, side by side, and press play on both. Open the ReactionSync popup, pick the source tab and the reaction tab, and hit Continue.

ReactionSync popup showing tab selection
02
Load the sync link

Have a sync link for this reaction? Click Load from Link and paste it: both start together, already lined up. No link yet? Start a manual session, line the two up yourself, and share the result as a sync link.

ReactionSync setup screen showing sync script options
03
The engine takes over

When either video needs to buffer or re-align, ReactionSync pauses both and waits. No manual intervention — both videos stay in lockstep at all times.

Both videos showing Buffering and Syncing toast
04
Just watch

Once synced, both videos play together. When the reactor stops the show to talk, your episode waits for them. Where their video skips part of the episode, the sync link handles that too. You never touch a timeline again.

Both videos playing in sync

Supported platforms

Source content

NetflixNetflix CrunchyrollCrunchyroll JioHotstarJioHotstar Prime VideoPrime Video

Reaction videos

YouTubeYouTube VimeoVimeo Google DriveGoogle Drive PatreonPatreon

For reaction creators

Turn your full reactions into sync links. Your viewers open one next to their own copy of the show, and it stays lined up for them: when you pause to talk, the episode waits for you.

Make your first sync link

ReactionSync does not host, distribute, or reproduce any copyrighted content. Users source all content from platforms they already subscribe to.