Your uploads encrypted in your browser Open source
For Claude

Let Claude share your HTML for you

When you've made something with Claude — a report, a proposal, a page — you can just ask Claude to share it privately, and it hands you a link to send on. No saving files, no account, no setup files.

You
This proposal looks great. Can you share it privately so I can send the client a link?
Claude
Here's a private link to the proposal — anyone you send it to can open it, and it expires in 30 days: html.cloud/v/kT4eN7xQ#b3FvXy…

Claude encrypts the page on your computer before it's uploaded, so not even we can read it. See how that works →

Add it to Claude Desktop

One file, one click — Claude Desktop has everything it needs built in.

  1. 1

    Download the html.cloud extension.

    Download for Claude Desktop

    A .mcpb file · macOS & Windows

  2. 2

    Double-click the downloaded file. Claude Desktop opens and offers to install it. (If it doesn't, open Claude's Settings → Extensions, click Advanced settings, and use Install Extension… under Extension Developer to pick the file — that works even when drag-and-drop doesn't.)

  3. 3

    Click Install. That's it — no accounts, no terminal, no settings to edit. The first time Claude uses it, you'll be asked to allow it; click Allow.

Try it

Make something with Claude, then ask:

Share this privately with html.cloud and give me the link.

By default the link expires in 30 days. Want it shorter or permanent? Just say so — “with a 7-day expiry,” or “that never expires.” Claude also gives you a private edit link with each share, so you can replace, re-expire, or delete the page anytime.

Using Claude Code or another app?

If you use Claude Code, add it with one command (this path uses Node.js 20+): 

claude mcp add html-cloud -- npx -y html-cloud-mcp
Manual setup for other MCP apps

Any app that supports the Model Context Protocol can run the server via npx. Add this to its MCP config (requires Node.js 20+):

{
  "mcpServers": {
    "html-cloud": {
      "command": "npx",
      "args": ["-y", "html-cloud-mcp"]
    }
  }
}

Questions

Is my HTML really private?

Yes. It's encrypted with AES-256-GCM on your own computer before anything is uploaded. The key to read it lives in the link after the # and is never sent to us, so html.cloud only ever stores scrambled bytes it can't read. The extension is open source, so anyone can verify that.

Do I need an account, or to pay?

No. There's no sign-up for html.cloud and nothing to pay. You just share links.

Do I need to install Node or anything else?

Not for Claude Desktop — it includes everything the extension needs. (The Claude Code and manual setups above use Node.js, which is a free one-time install.)

Who can see a page I shared?

Only people you send the link to — the link is the key. Treat it like a password: share it through a trusted channel, and set an expiry for anything sensitive.

Can I change or remove a page after sharing?

Yes. Every share comes with a private edit link. Open it to replace the page (the share link stays the same), change when it expires, or delete it right away.

Why doesn't it show up in Cowork?

That's a current Claude Desktop limitation, not something you did wrong. Cowork sessions don't yet load locally installed extensions like this one, so the tool only appears in regular chats. Ask for your share link in a normal conversation — or paste the finished HTML into one and ask Claude to share it. When Anthropic adds extension support to Cowork, this will start working there without any changes.

Prefer to do it yourself?

You can drop a file on the homepage or use the command line — same encryption, same private links.