Responsive Design Tester
Preview any page at common screen widths. Some sites block embedding.
Put it online in seconds
Pagelet turns any HTML file into a live URL on your own subdomain — free, no account needed. Drag a file on the homepage or paste your code.
About the Responsive Design Tester
Preview any page at the four screen widths that matter — mobile (375px), tablet (768px), laptop (1024px) and desktop (1440px) — without resizing your browser window. Perfect for checking that your published pagelet site looks right on every device.
How to use it
- Enter the URL of your page.
- Press Load, then switch between device widths.
- Fix any layout that breaks, re-publish, and check again.
Frequently asked questions
Why does some site refuse to load?
Some sites send an X-Frame-Options header that forbids embedding — that's a security policy of that site, not a bug in the tester. Test your own pagelet pages freely.
Part of the free pagelet tool set — no account needed. Want to publish a page too? Drag a file and it's live.