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How to stream on Twitch and TikTok at the same time

TikTok LIVE puts you in front of people who'd never search for you on Twitch. The catch: TikTok is watched on phones, held upright, so a widescreen stream shows as a thin strip. The best setup sends Twitch your normal 16:9 picture and TikTok a 9:16 one, from the same OBS.

Below: how to go live on both with Multistream Cloud (one upload) or the free Multistream app (from your PC), and how to add the vertical picture.

Method 1: Multistream Cloud (one upload for every platform)

Multistream Cloud takes one stream from OBS and sends a copy to Twitch and TikTok, and to up to 12 platforms in all. Your internet only uploads that one stream, so adding a platform doesn't need a faster connection. It comes with Pro, $10/mo.

  1. Create your Multistream account, then get Pro on your Account page.
  2. In the Studio, step 1 (Pick platforms), click Add a platform and add each one:
    • Twitch: click Sign in with Twitch, then Authorize in the Twitch window. Multistream reads your stream key for you.
    • TikTok: paste the server URL and stream key from TikTok LIVE Studio or TikTok's LIVE settings. TikTok only gives a stream key to accounts it has allowed to go live from streaming software.
  3. Install Multistream for OBS (Windows 10 or 11, OBS 31 or newer) and open OBS. The Multistream dock opens on the right.
  4. In the dock, click Sign in with your browser and approve it.
  5. The dock's pre-flight check looks at your OBS settings, Multistream Cloud, your platforms and where OBS sends. If OBS isn't sending to Multistream yet, click Point OBS at Multistream.
  6. Click Go live on 2. After a 3, 2, 1 countdown, OBS starts streaming and Twitch and TikTok go live.

If OBS or your internet drops, Pro keeps your platforms live on your BRB clip for up to 30 minutes, and when OBS is back you carry on in the same broadcast, with the same chat. Turn it on under Disconnect protection.

Method 2: the free Multistream app (from your own PC)

The free Multistream app for Windows can send the copies from your own PC instead. Your upload then carries one copy for each platform, and if your PC's internet drops, your platforms drop with it. Run the app's Speed test first to see what your connection can carry.

  1. Download the Multistream app for Windows 10 or 11 and open it.
  2. Go to Multistream → Go live and set Where the relay runs to This PC.
  3. Open Setup guide and click Add a platform for Twitch and TikTok. Twitch, YouTube and Kick accounts you've connected in the app add in a click; the others take their stream key.
  4. Install Multistream for OBS and open OBS. Without Pro, the Multistream dock sends your stream through the app on this PC, so keep the app open.
  5. Click Go live on 2 in the dock. Your PC uploads one copy for each platform.

Give TikTok a vertical picture

Add the free Multistream Vertical tool to OBS (it's offered after the settings check in the Studio's step 2, and in the app's setup guide). It sends a second, 9:16 picture next to your main one, and Multistream sends that one to TikTok and the 16:9 one to Twitch.

Without it, TikTok gets your widescreen picture, which still works but looks small on a phone.

Good to know for Twitch and TikTok

Getting a TikTok stream key. TikTok only gives a stream key to accounts it has allowed to go live from streaming software. If yours has one, it's in TikTok LIVE Studio or TikTok's LIVE settings, and it can change between streams, so paste the new one into Multistream when it does.

TikTok's rules on screen. TikTok's LIVE rules forbid showing another platform's info, like a merged chat overlay or an "also live on" banner. Multistream's pre-stream check reminds you.

Twitch's simulcasting rules. Don't point Twitch viewers to TikTok, keep Twitch's stream at least as good, and don't show TikTok chat on your Twitch stream.

Questions, answered

Can you stream to Twitch and TikTok at the same time?

Yes, if TikTok has given your account a stream key for streaming software. Twitch allows it under its simulcast rules.

How do I make my stream vertical for TikTok?

Add the free Multistream Vertical tool to OBS. It sends a 9:16 picture next to your 16:9 one, and Multistream sends each platform the right one.

Why can't I find my TikTok stream key?

TikTok only shows a stream key to accounts it has allowed to go live from streaming software. Check TikTok LIVE Studio or TikTok's LIVE settings.

Can I show my TikTok chat on stream?

Not on the Twitch or TikTok stream itself while you simulcast: both platforms' rules forbid showing the other platform's chat there.

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