Multi Device Viewer

Preview and compare websites across local device viewports with screenshots, annotations, and realistic mockups.

Multi Device Viewer opens a full-screen simulator overlay on the page you are already on. Click the extension icon, and the current site immediately appears inside realistic device frames without navigating away or opening a new tab. Close the overlay and the page is exactly as you left it. Preview across devices - Compare up to four device viewports side by side in resizable panels. - Choose from a built-in catalog of phones, tablets, laptops, desktops, watches, and TVs. - Switch orientation, zoom, fit mode, and reload each panel independently. - Save favorites, browse recents, or create a custom viewport size. Realistic device shells - Accurate frame profiles for every device category. - Phone, tablet, laptop, desktop, and watch shell renderings. Capture & Annotate - One click in the sidebar captures the entire simulator view as-is. - Built-in annotation editor: pen, rectangle, arrow, text, and crop tools. - Eight-color palette, three stroke widths, font size picker. - Crop bakes your annotations into a trimmed canvas. - Copy to clipboard or download. Everything stays on your machine. Privacy-first by design - No account required. - No backend service. - No analytics, telemetry, or remote logging. - Screenshots, URLs, annotations, and settings never leave your browser. - Preferences saved locally in Chrome storage.