A free tool to demo desktop + mobile layouts to clients on one screen

Hi everyone,

I'm a full-stack web developer, and I built a free Chrome extension called Mobile View to solve something that kept slowing me down at work.

When you build responsive sites, you constantly need to check how a page looks on mobile while you're working on the desktop version — and the usual options either hide one layout when you switch, or feel clunky. The part that really pushed me to build this was demoing work: when a client or an employer asks "how does it look on a phone?", screen-sharing a narrow browser window never looks great.

So Mobile View overlays a real device frame right on top of the live page. You see the desktop and the mobile (or tablet) layout at the same time, in the same tab, with scrolling, clicks and typing synced between them.

Where it's been most useful for me:

- Presenting responsive work to clients and employers — multiple devices on one screen reads instantly, no "trust me, it'll look fine."

- Taking clean device-framed screenshots for a portfolio, a GitHub README, or a hand-off.

- Recording the screen to show a layout in action.

It runs entirely locally in the browser — no servers, no analytics, no tracking.

It's aimed mainly at web developers and designers who work with responsive layouts. If that's you, I'd genuinely love your feedback — bugs, missing features, anything that feels off.

Chrome Web Store: https://chromewebstore.google.com/detail/mobile-view-mobile-simu/hocbjiaeeijekejepphjihbpogikmofh

Short walkthrough:

Thanks for taking a look.