Stream Multiviewer – Watch YouTube and Twitch Side by Side, Free
Tired of switching tabs between streams?
During a collab stream or a tournament, there is usually more than one broadcast worth watching. By the time you have switched tabs, the moment you wanted to see has already passed. Each participant is doing something different, and you can only follow one of them at a time.
Stream Multiviewer lets you watch YouTube and Twitch live streams side by side in a single window. Paste a URL and the stream appears — up to four at once — with sound coming from whichever one you choose.
No account and no installation. Your layout becomes a shareable link, so you can hand someone the exact set of streams you are watching.
How to use it
1. Add a stream
Paste the URL of the stream you want into the field at the top and press Add.
- YouTube: a normal video URL, a
youtu.beshort link, or a live stream URL all work - Twitch: the channel URL, or just the channel name on its own (for example
shroud)
2. Choose a layout
The icons at the top switch between a single pane, two panes, one large plus two, and four panes. On a phone the panes stack vertically on their own.
3. Choose which stream you hear
Press the 🔊 button on a pane and only that stream plays sound. Everything else is muted automatically, so you never end up with several streams talking over each other.
4. Line the streams up
Live streams carry a delay of anywhere from a few seconds to a dozen or more, and it differs between services. Press ⚡ Sync and every pane jumps to the live edge together.
What the buttons do
| Button | What it does | When to use it |
|---|---|---|
| ⚡ Sync | Moves every stream to the live edge | Watching live. Start here |
| 🎬 Cue up | Pauses everything, then plays together after a countdown | Watching archives together |
| ⏱ (per pane) | Holds that pane back by 0.5 seconds | When one stream runs ahead |
| ⏭ (per pane) | Catches that pane up to live | When one stream lags behind |
| Chat | Shows the chat for the stream you are hearing | Following the comments |
| Copy link | Turns your current set into a shareable URL | Sending it to someone else |
When they still do not quite line up
Frame-accurate alignment is not possible, and that is a limitation of the services rather than the tool. Each stream carries its own delay, and a viewer has no way to change it.
In practice, though, you can get close enough that it stops being noticeable. Here is the routine.
- Press ⚡ Sync first to bring everything roughly into line
- If you hear an echo, or a reaction lands early, press ⏱ on the pane that is running ahead
- Each press holds it back half a second, so two or three presses usually does it
Where it comes in handy
Collab streams are the obvious one. Put every participant side by side and you get to see the same moment from each angle — the person setting up a prank and the person walking into it, at the same time.
Esports tournaments work well too. Keep the official broadcast running alongside a player’s own point of view, so you get the commentary and the mechanics together.
Viewer-participation events become much easier to follow when you can see what everyone is doing at once.
Background listening is a quieter use. Leave several streams running and pick whichever voice you actually want to hear.
Frequently asked questions
Do views through this tool count towards the streamer’s viewer count?
Yes. Twitch counts views from embedded players towards a channel’s viewer count, and a muted pane is still counted. YouTube likewise includes embedded playback in its concurrent viewer figures, so you can use this without shortchanging anyone.
There is a reporting delay of roughly 30 to 90 seconds. Note also that if you leave this page behind another tab, the browser suspends playback and the view may stop counting.
Can I post comments?
Use the “↗ Post” button on the chat panel to open the chat in a separate window, and post from there.
Chat embedded inside another page often cannot see your signed-in session, because of how browsers restrict third-party cookies — Safari especially. A separate window is treated normally, so you stay signed in.
Can I send one comment to several streams at once?
No, and that is deliberate. Broadcasting the same message across multiple streams is how spam works, so the feature is not here. This is a viewing tool only.
Does it work with archives?
It does. For past broadcasts, 🎬 Cue up is the one you want: it pauses every pane and then starts them together after a three-count.
Can I watch more than four at once?
Four is the limit for now. Beyond that each pane gets too small to follow, and running that many streams at once puts real strain on the device.
Does it work on a phone?
Yes. On narrow screens the panes stack vertically on their own. Keep in mind that several streams playing at once will use a fair amount of data and battery.
A stream will not load
A few things to check.
- Whether the stream is unlisted or members-only, since embedding is often blocked in those cases
- Whether you pasted a YouTube channel URL (the
@usernameform). Paste the URL of the live video itself instead - Age-restricted streams are frequently blocked from playing on external sites
A few things worth knowing
There is no account to create and nothing to install — opening the page is the whole setup. You are never asked to sign in, and no personal information is collected.
This is a viewing tool, with no bulk-posting or anything else that could be turned into a nuisance. Playback runs through the official YouTube and Twitch embedded players, so ads and viewer counts behave exactly as they would anywhere else.