vMix Master
A complete control panel for vMix in your browser: one system, or several working as one. Nothing to install.
The demo runs three simulated vMix systems in your browser, so you can try everything without vMix and nothing is sent over the network.
vMix Master puts the whole show on one page: every input by name, program and preview with timers, overlays, audio buses with meters, playback controls, and any vMix function. It works just as well for a single vMix. When a production uses more than one machine, such as a main stream plus translated streams, a hot backup, or several rooms that must switch together, pick one vMix as the master and add the others to its group. Every switch, audio change, or custom API command is then sent to all of them.
Features
- Group control: commands from the panel go to the master and every vMix in its group. The master is marked on its group button.
- Program and preview: large timers, a position slider, Restart and Play/Pause, and six transition buttons (Quick Play, Cut, Stinger 1, Stinger 2, Fade, FTB).
- Names, not codes: every input is shown by its name, so you can tell what is what at a glance.
- Inputs and audio: every input as a tile with overlays 1–6, loop, volume, and send-to-bus buttons, plus the audio buses with live level meters.
- At-a-glance status: each vMix has a status dot (connected, unreachable, no address), and its program and preview inputs.
- Edit in place: double-click a name or an address to change it, and toggle group membership with one click.
- Function buttons: start and stop outputs (external, SRT), audio, playback, timers, and scripts, grouped by category, plus a raw request box for any vMix API function.
- Setup check: compare group members for mismatched buses, call sources, input types, layers, and durations before you go live.
- Follow-the-master scripts: drop-in vMix scripts make the other systems copy the master's active input, preview, and playback position, see vMix scripts.
- Works on a phone or tablet and can be installed as an app from Chrome.
- Zero install: it is a static page. Open the hosted site, or run it from a local copy.
How it compares
Each tool fits a different job.
| vMix Master | vMix Web Controller (built-in) | Bitfocus Companion |
|---|
| Best for | Full control of one vMix, or several switching together | A few inputs and simple switching and transitions | Custom button surfaces and hardware (e.g. Stream Deck) |
| Install | None, runs in the browser | None, built into vMix | A separate app running on a machine |
| Multiple vMix instances | ✅ Yes, via master/group | ❌ One instance per page | ⚠️ Yes, but you build the pages and sync logic |
| Input labels | ✅ Names, e.g. 05 Opening Video.mp4 | ❌ Type letter and number only, e.g. V 5 | ⚠️ Whatever you label each button as |
| Follow-the-master scripts | ✅ Included | ❌ | ❌ |
| Setup comparison | ✅ | ❌ | ❌ |
| Hardware control surfaces | ❌ | ❌ | ✅ |
| Free and open source | ✅ | ❌ Part of vMix (not open source) | ✅ |
✅ yes ❌ no ⚠️ possible with extra work
Easy to read at a glance. In a live show you shouldn't have to remember that V 5 is the opening video. vMix Master shows every input by its name and number, with its audio level, marks what is on air and in preview, and shows a large timer for both. The built-in Web Controller labels inputs only with a type letter and a number (for example C 2 or V 5), as described in vMix's own guide.
Use the built-in Web Controller if you have a few inputs and only need simple switching and transitions, and Companion if you want physical buttons. Use vMix Master when you want fuller control from a browser, and whenever several vMix machines need to switch together.
This is the beginning of the README. Read the rest at the original. Read the full README ↗
