Your editor,
your layout.

Kosmos is a code editor where every view is a tab you can place anywhere. Split panes in any direction, rearrange freely, and switch between workspaces without losing a thing.

Download Contribute

Everything is a tab.

No fixed sidebars, no locked panels. Every element in Kosmos — your file tree, terminal, preview, settings — is a tab that lives wherever you put it.

Flexible Layouts

Split panes horizontally, vertically, or nest them however you want. Drag any tab into any pane. Your workspace adapts to your workflow, not the other way around.

Persistent Workspaces

Switch between projects instantly. Every workspace keeps its terminals, layouts, and active state running in the background — no lost context, no reloading.

Infinity Tab

An infinite canvas where you can instantiate any tab — editors, terminals, previews — and arrange them freely in open space. Think beyond rows and columns.

Extension Marketplace

Browse and install new tabs from a built-in marketplace. Every extension adds a new type of tab you can place anywhere in your workspace — expanding what Kosmos can do.

Open source. MIT licensed.

Kosmos is free and open source. Try it out or help shape the future of code editing.