A responsive viewer that loads every device at once

DevTools shows one viewport at a time. Hoverify's responsive viewer puts every device you've picked on screen together, and a scroll, a click or a line typed into a form on any one of them carries across the rest.

Not in the sense of running iOS or Android. A mobile simulator Chrome extension, whatever it calls itself, renders pages in the browser you already have, and Hoverify is no different: your page loads at each device's real viewport, inside its frame and status bar, with a user agent you can change. That finds layout breaks, overflow and tap targets that are too small. It will not find a bug that only shows up in Safari's rendering engine, and no extension can reach that far, so keep a real device in the loop before you ship.

33 presets ship with the extension. Phones: the full iPhone 16, 15 and 14 families, each with its Plus, Pro and Pro Max; iPhone 12, 12 Mini and 12 Pro Max; iPhone 11; Galaxy S20, S20+ and S20 Ultra; Galaxy Note 10 and Note 10+; Pixel 4, Pixel 5 and Pixel 7 Pro; and the Nothing Phone. Tablets: iPad, iPad Pro 11 and Nexus 7. Tailwind's five breakpoints round out the 33. Add your own profile for anything that isn't there.

Yes. Most responsive checker extensions load your page in an iframe, which fails on sites that send X-Frame-Options or a frame-ancestors policy. Hoverify can inject the viewer straight into the page instead, so those sites still render.

One device per click. Each device on the board has a Capture button with two choices, the visible viewport or the full scrollable page, and the shots collect in one sheet as you take them. There you can retake or drop a device, draw on a shot with the same annotation tools Capture has, save it as PNG, JPEG or WebP, copy it, or download the whole set as a zip. Any shot can also go to the screenshot editor.

Yes. Zoom the board out and the devices scale with it, so a 2560px viewport is testable on a laptop screen. There's also a single-viewport mode where you drag the edges to any width and height you want.

Chrome and Firefox, plus Edge, Brave and the other Chromium browsers, which install the Chrome build. The responsive viewer Chrome extension and the Firefox add-on are the same tool, and one license covers them both.

The viewer is one of Hoverify's nine tools, and Hoverify is paid, with a 14-day refund behind it. Run it against your own breakpoints for a fortnight and you can still back out. That refund is what replaces a free tier. One license covers 3 browsers at a time, and it never renews on its own. See the pricing.