The Fastest Way to Share an HTML File Online (Free, No Signup)

You have an HTML file and you need a public URL for it. Maybe it's a Claude artifact, a prototype, a demo page, or a quick visualization. You don't want to configure a server, set up Netlify, or create another account somewhere.

Here's the fastest way.

Use ShareDuo

Go to shareduo.com. Drop your file. Get a link. Done.

No signup. No configuration. No domain needed. The link is live in under 10 seconds and works in any browser.

Step by step

1. Open shareduo.com
2. Drag your .html file onto the drop zone, or paste the HTML directly into the text area
3. Choose how long the link should stay live: 1 hour, 1 day, 7 days, or 30 days
4. Optionally add a password if you only want specific people to see it
5. Click "Upload & share"
6. Copy the preview link and share it

What you get

• A preview link anyone can open — no account, no login
• A private manage link so you can check view counts and delete the file later
• The artifact runs exactly as written — external scripts, fonts, and libraries all work

Common use cases

• Claude artifacts — share AI-generated dashboards, games, and tools with people who don't use Claude
• HTML prototypes — share a design mockup with a client without deploying anywhere
• Demo pages — quick one-off demos for a presentation or sales call
• Static reports — share a data report as an interactive HTML page instead of a PDF
• Landing page tests — A/B test a copy variation before committing to a deploy

Limits

Files up to 5 MB. Links expire automatically based on the window you choose (max 30 days). Free forever, no account required.