Design visually
Click anything on the page and shape it.
Type, colour, spacing and layout sit in one ribbon, with separate styles for tablet and phone.
The website builder your AI can use too.
Design on a visual canvas, or connect Claude, Cursor or any MCP app and watch it build right next to you. Both edit the same page, and it publishes as fast static HTML.
Free to start. No account needed to try.
Built on open foundations
- Open source (AGPL)
- Static HTML and CSS
- Works with any MCP app
- Design tokens
- Light and dark modes
Everything you need, in one editor.
Connect your AI
Your AI edits the same page you do.
Give Claude, Cursor or any MCP app your site’s address. You approve it once and see every edit it makes.
Publish
One click to a fast, static site.
Every release is a saved snapshot of plain HTML and CSS. Keep editing without touching what is live.
Real building blocks, not a sealed theme.
Design tokens
Colours, spacing and type, named once and used everywhere.
Components
Build a header once and reuse it on every page.
Collections
Blog posts and other content, each with its own page.
Breakpoints
Adjust any style for tablet and phone.
Light and dark
Give every token a value for each mode.
Your site stays yours.
Open source
Run it yourself, any time.
Lacuno Community is AGPL licensed. Host the editor and your sites on your own server whenever you want.
Static output
Plain HTML and CSS.
No runtime and no lock-in script. Pages load fast and are easy to host anywhere.
One document
No black box underneath.
Your whole site is one structured document. You and your AI edit the same source of truth.
Start building today.
Open the editor in your browser. Sign up when you want to publish.