The Cloud is just somebody else's computer
Storage
Work locally by default, or sign in for cloud sync — every part is a self-contained .cubby document, saved automatically.
CubbyCAD keeps your work organized into workspaces, and you choose where each one lives. By default everything stays in your browser with no account needed; you can also save parts as files in a folder on your computer, or sign in to sync to a cloud workspace you can reach from any device.
Each part is one self-contained .cubby document — it holds the scene graph, sketches, undo history, metadata, and a thumbnail. Autosave runs in the background on every backend, so you rarely need to think about saving.
How to use it
Open the workspace chooser
On first launch (or via ), the Choose where to work dialog opens. Pick one of three destinations.
Use browser storage
Browser storage (recommended) — works instantly, no account, parts saved in this browser only.
Sync to the cloud
Cloud workspace — sign in, then create or pick a workspace to sync parts so you can pick up on any device. Signed-out users can still see public/official workspaces (read-only).
Save to a local folder
Open a folder on this computer — choose a folder and parts are written as .cubby files there (browsers that support the File System Access API only).
Work with autosave
Work as normal — autosave flushes about 1.5 seconds after you stop editing (and at least every 30 seconds during continuous edits). Press Ctrl+S to force a save, or Ctrl+Shift+S for .
Watch the status pill
Watch the status pill at the bottom-right: it reads Unsaved changes, Saving…, then Saved just now / Saved Xs ago, or Save failed if something went wrong.
Tips
- Autosave only runs once a part actually has a destination (a saved file/workspace). Brand-new drafts, dirty script edits, and un-applied mesh repairs are not autosaved.
- If you try to switch workspaces with unsaved drafts, you'll be warned and asked to confirm before discarding them.
- Closing the tab while a save is still in flight triggers the browser's "are you sure you want to leave" prompt, so the last edit isn't lost.
- A .cubby file is one part. Imported mesh assets and custom fonts are stored alongside it in the workspace (not embedded) and referenced by the part — so keep them together.
- Your last-used destination is remembered and highlighted next time the chooser opens, but it isn't auto-applied — you always pick deliberately.
Try it in your browser
Open CubbyCAD and put Storage to work — it runs in the browser, no install.