📱 Open-source multi-device responsive review and QA workspace for Chrome & Chromium browsers. Persistent previews, zero-reload geometry, and optional local MCP bridge.
Open-source multi-device responsive review and QA workspace for Chrome & Chromium browsers. Keep real websites alive inside multiple viewports with zero-reload geometry changes, deterministic QA audits, and an optional local MCP bridge for AI agents.
Interactive demonstration: Multi-device sync scroll, Row & Focus layouts, hot zero-reload rotation, device presets, and deterministic QA checks. (Download MP4 Video)
- Persistent Previews (Zero-Reload Invariant): Resizing, rotating, switching shells, adjusting workspace resolution, changing layouts, or zooming never unmounts or reloads the active website iframes. - Side-by-Side Multi-Device Review: Preview up to 5 concurrent viewports simultaneously with accurate pixel ratios (Apple, Google, Samsung, Tablets, Laptops/Desktops, and Custom viewports). - One-Click PNG Screenshots: Instantly capture and download pixel-perfect PNGs of any device or the complete review canvas directly from the UI. - Local Dev Friendly: Smart URL normalizer detects localhost, LAN IPs (192.168.x.x, 10.x.x.x), and dev domains (.local, .test) without forcing HTTPS, plus auto-saved recent URL history. - Crisp vs. Fit Scaling: - Crisp: Maximizes 1:1 pixel sharpness within the visible canvas. - Fit: Proportionally scales all active viewports so the entire device fleet is visible at a glance. - Deterministic Responsive QA Checks: Instantly detect horizontal layout overflow, clipped text, touch targets smaller than 44×44px, missing image alt attributes, and unlabelled form controls — no AI hallucinations, purely deterministic. - CSS Breakpoint Discovery Rul
From the project README.
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