Free website previewer for mobile, tablet, and desktop.

Paste your website’s address above and press Preview. The live page opens in phone, tablet, and desktop frames side by side, so you can compare all three at once. Rotate the phone, zoom in, or focus on one device. You don’t need developer tools or a phone, though a last check on a real phone is still worth it.

Compare the same page in the phone, tablet, and desktop frames. A responsive site rearranges itself: text stays readable, images fit, and menus and buttons stay easy to reach. Watch for text cut off at the edge, sideways scrolling, and overlapping content. This is a visual check in your browser; it doesn’t score your site.

The site’s security settings say it can’t be shown inside another page, and browsers obey. You’ll see “doesn’t allow previews” or, if our check can’t tell, the browser’s own “refused to connect”. The site isn’t broken. If it’s yours, ask your developer to allow previews, even temporarily, with this response header:

Content-Security-Policy: frame-ancestors 'self' https://onlinewebsitepreviewer.com

It must be a server header, not a meta tag. If a frame-ancestors rule already exists, add our address to it. Any X-Frame-Options header can stay.

Desktop is 1920 × 1080, tablet 820 × 1180, and phone 390 × 844, in CSS pixels. The phone matches recent iPhones (14 and 15) and the tablet a 10.9-inch iPad, but this is layout size only, not device emulation. Rotate the phone or tablet for landscape. Custom sizes aren’t offered. For help choosing what to review, see which screen sizes to use.

Yes. Open this page on your phone, paste an address, and press Preview. Swipe between the desktop, tablet, and phone previews. The desktop frame is scaled to fit your screen, so zoom in to read details. Your phone’s browser stays a phone browser; the frame only gives the page a desktop-sized window.

No. It shows how the page lays out at a narrow width in your current browser, not exactly how it will look on an iPhone. It doesn’t copy iOS, Safari, touch input, or device performance. Check the page on a real phone too. See what a phone preview shows and what to check on a real phone.

Yes. Each frame loads the live page, not a screenshot, so you can scroll, follow links, open menus, and fill in forms. Those are real actions on the real site: submitting a form or placing an order has its usual effect. Links set to open in a new tab do so; links that try to replace this whole page, and file downloads, do nothing inside a preview.

Some websites choose their layout from the browser type instead of the screen width. The preview changes the width, not the browser the site sees, so those sites keep serving their desktop version. Sites that adapt to screen width, which is most modern ones, respond to each frame. A real phone shows what phone visitors actually get.

Yes, if your browser can reach the site and it allows previews. Staging and test addresses work like any other site. For a site on your computer, enter an address such as localhost:3000 in Chrome or Firefox; Chrome may ask for permission to reach your local network. Safari blocks local HTTP pages inside secure pages. On a phone, localhost means the phone itself.

Often not. Many sites don’t send their sign-in cookies to pages shown inside another site, so signing in, here or in another tab, usually doesn’t carry over to the preview. Chrome and Edge also block the browser’s own password prompt (basic authentication) inside a frame, and some login pages refuse framing. Public pages and staging sites without a login work best.

It’s free, with no account, no sign-up, and no limit on previews. There’s nothing to install: it’s a web page that works in any modern browser on a computer, tablet, or phone.

Yes, for a quick check. When you press Preview, the address goes to our checker, which reads only that site’s security headers to see whether it allows previews. It doesn’t log addresses; it keeps the address and answer in memory for up to 10 minutes. For that check, the website sees our server, not you. The page itself loads straight into your browser. See our privacy statement.