Capabilities
Your dev server, one tab over.
Loom auto-detects dev servers started anywhere in the workspace and opens them in an inline preview tab. See what ships without leaving the app.
Web preview
No window juggling.
Auto-detected
Start a dev server in any terminal and Loom notices. No copying URLs out of scrollback, no hunting for the right port, no separate browser window drifting behind the app you actually work in.
An inline tab
The preview opens as a tab inside the workspace, right next to your terminals, the editor, and the source control panel. The running app and the code that produced it share one window.
Made for fleet work
When six sessions are building screens in parallel, the preview is how you judge the result as it lands, while the work is still in flight.
Zero ceremony
Run it like you always do.
There is nothing to configure and nothing to install. Start the dev server the way you normally would, in any tab or split of the terminal, and Loom picks it up. Whether you typed the command yourself or one of the six fleet sessions did as part of a mission, the preview works the same way. That matters more than it sounds: the fleet starts servers constantly, and you should never have to go digging for where the app is running.
# start the server as usual
$ npm run dev
# Loom detects it and opens
# an inline preview tabWhere it earns its keep
Seeing is reviewing.
Frontend polish
Divide screens among sessions for a design-system sweep, then check each one in the preview as it lands. The frontend polish page shows the pattern.
Prototyping
Six parallel attempts, one place to look at them. Pick what works by seeing it run, not by reading a summary of it. More on prototyping with the fleet.
Design tab builds
When the Design tab hands a site to the fleet, the preview is where you watch it become real, and the source control panel is where you review the code behind it.
Hand it the work.
Walk away.
macOS, Linux, and Windows. Around 13 MB. Free and open source.