Download JCSS
Version 0.3.27, October 8, 2026
Alpha softwareExpect bugs and changes that break shows. Report problems to jcss@joshcirre.com.
Windows
Windows 10 or 11, 64-bitDownload for WindowsRun the installer. If Windows warns, choose More info › Run anyway.Stream Deck pluginMac and Windows
Scenes, shots, titles, recording and going live on Stream Deck keys and dials, each lit from the show. Needs Stream Deck 7.1 or later.Download the pluginOpen the file and Stream Deck installs it. JCSS for Mac can install it for you: Settings › Control.What’s new in 0.3.27⌄
New
JCSS has a new home: jcss.tv
- The app, Stream Deck plugin and extensions now use jcss.tv. jcss.joshcirre.com keeps working, so nothing you've shared breaks, and you stay signed in after updating.
- On the website, sign in with your existing passkey ("Used JCSS before jcss.tv?"), then add one for jcss.tv in a click.
Every scene, or this scene
- Camera section in the inspector: choose This scene or All scenes for a camera's zoom, mirror, look and background. "Its own here" shows what a scene changed, with Use all scenes' to undo it.
- Zoom one camera in a switcher without zooming the others.
- Stack LUTs, each with its own strength. Looks now sit together above Adjust.
- Right-click a camera in the sidebar › Settings for all scenes… without putting it on program.
Cameras and layers
- Replace with and new camera switchers also list cameras and displays that are plugged in but not in the show yet. Replace now changes the 9:16 too.
- Arrange from 16:9 button on the 9:16.
- Number fields select their value when you click into them.
JCSS Multistream and Twitch's VOD track
- On a Twitch destination, tick Send from this Mac (keeps the VOD track) and Sign in with Twitch. Twitch then goes straight from your Mac with the VOD track, while Multistream sends everything else. It uses about one more stream's worth of upload.