Small surface. Endless possibilities.

HTMLDrop is a collaborative playground for the web. Three files, an instant preview, and a permanent home for your experiments.

Start with an idea

Open the workspace and start typing. HTML, CSS, and JavaScript are automatically combined in the live preview. No setup, build step, or account is required.

Built for the way you make things

• Create a public guest project or fork an existing experiment.
• Share the editor link to collaborate, including live cursors and selections.
• Publish an immutable version when you reach a meaningful milestone.
• Share the public page, or embed a preview on your own site.
• Experiment with real HTTP headers on a separate, sandboxed preview origin.

About this release

This is a functional local guest release. Custom domains, transactional email, and admin tools are not implemented yet. Pro adds private drops. Google sign-in gives you owned drops with custom addresses, editable only by you and the editors you invite. Claude and Codex connect with your own API key. The API and MCP currently expose public guest projects only. Realtime uses a Yjs WebSocket relay; peer-to-peer WebRTC is a later addition.