You built something great in Claude — a dashboard, a game, a data visualization — and you want to share it. You hit Publish, copy the link, and send it. Then your friend replies: "It's asking me to log in."

This is the core problem with Claude's native sharing. The published link works, but only for people who already have a Claude account. Everyone else hits a signup wall.

Why Claude's Publish doesn't work for everyone

When Claude publishes an artifact, it hosts the preview inside claude.ai — a domain that requires authentication. There's no way to make a Claude-hosted artifact truly public without the viewer having an account.

This isn't a bug. It's just how Claude is built. The artifact lives inside the Claude product, and Claude requires a login.

The fix: host the HTML yourself

Every Claude artifact is standard HTML. You can copy that HTML and host it anywhere — and once it's hosted outside claude.ai, anyone can view it with no login required.

ShareDuo is the fastest way to do this. It takes about 30 seconds.

Step-by-step: share a Claude artifact with anyone

Get the HTML from Claude. In the artifact panel, click the download icon to save it as an .html file. Or ask Claude directly: "Show me the full HTML for this artifact" — it will paste it into the chat.
Go to shareduo.com. Drag and drop the file, or paste the HTML into the text area.
Set your options. Choose how long the link should stay live (1 hour to 30 days). Optionally add a password.
Click "Upload & share." You'll get a preview URL instantly.
Share the link. Anyone can open it in any browser — no Claude account, no login, no subscription required.

What you get

Every ShareDuo link comes with a private manage page where you can see how many times the link was opened and delete it when you're done. The preview runs on a separate domain so interactive artifacts — those using Chart.js, Google Fonts, CDN scripts — work exactly as Claude built them.

Sharing directly from Claude (advanced)

If you use Claude frequently, ShareDuo has an MCP server that lets Claude push artifacts directly without leaving the conversation. You say "share this artifact" and Claude uploads it and returns the link — no copy-paste required. See the GitHub repo for setup instructions.

Summary

Claude's native Publish requires viewers to have a Claude account
ShareDuo hosts the HTML on a public URL anyone can open
Takes ~30 seconds, free, no signup required