Create HTML App

A Hubble HTML App is a folder-local .html file Hubble runs as a self-contained interactive UI. Opening it shows the app in the main content panel. Build any interactive experience — a tool, dashboard, or app — as a single .html file in the Folder.

To embed an HTML App inline inside a Markdown File, see create-embed.

Runtime

Hubble provides the app runtime. Write plain HTML that assumes these globals are already available:

• hubble
• Alpine
• Tailwind browser v4
• Hubble theme tokens

Use Alpine and Tailwind by default. Do not add dependency <script> tags or set up package files, lockfiles, or node_modules.

HTML Apps run in a sandboxed iframe. Hubble allows: