Responsively

It provides a browser‑like environment that shows many device viewports side‑by‑side, letting developers see how a site renders across phones, tablets, and desktops without manually resizing. Interactions such as clicks, scrolling, or navigation performed in one viewport are mirrored to all others in real time, and a unified inspector lets elements be inspected across every device with a single shortcut. Users can save groups of device configurations as “Preview Suits” for fast context switching, capture full‑page screenshots of all viewports with one click, and add custom device profiles alongside the extensive built‑in collection. The tool also includes standard browser capabilities like cookie, local‑ and session‑storage management, bookmarks, and typical dev‑tools features, all packaged in an open‑source, free‑tier application aimed at web developers who need precise, efficient responsive design workflows.