Responsive preview studio

See your app at every size, at once.

Type a port. Morph lays your app across every device breakpoint in real, interactive frames — scroll them, click them, watch them all respond together. Built for developers who are tired of resizing one window.

Launch studio See how it works

Free, no account. Starts with your local dev server.

Three steps. No setup.

  1. 01

    Type a port, or paste a URL

    Running a dev server on 5173? Type 5173 — Morph expands it to localhost:5173. Or paste any live URL.

  2. 02

    Every breakpoint lays out at once

    Phone, tablet, laptop, desktop — each frame at its true relative size, side by side in one glance. No tab-switching, no dragging a window edge.

  3. 03

    Each frame is the real thing

    Not a screenshot. A live, scrollable, clickable iframe. Fill a form on the phone frame, hover a menu on the desktop one — it all works.

Under the hood

Real frames. Nothing leaves your machine.

True-size, then scaled

Each frame renders an iframe at the device's genuine logical width, then scales it down with a CSS transform. The transform preserves hit-testing, so a scaled frame stays fully interactive — clicks and scroll pass right through.

Your localhost stays yours

An iframe's address resolves in your browser, not on Morph's server. Preview 5173 and the frame hits your own machine — the server never sees it, and neither does anyone else. Private by design.

Some sites opt out

Sites that send X-Frame-Options or a strict frame-ancestors policy refuse to embed anywhere — that's their call, not a Morph limit. Your own apps and dev servers load fine.

Point it at your dev server.

Launch studio
morph Responsive preview, all at once.