Browser SplitView Master

Browser SplitView Master is a premium, high-performance workspace utility that allows you to divide a single browser tab into up to 16 independent, resizable grid panels. Perfect for developers, QA testers, researchers, and multi-taskers who need to view and interact with multiple sites side-by-side without managing cluttered browser windows.

Key Features:

• Multi-Panel Grid Splitting: Vertically or horizontally split any panel with a single click. Resize boundaries dynamically using smooth drag handles without reloading iframe contents.
• Intelligent Scroll Synchronization: Toggle simultaneous scroll tracking to browse multiple pages, documents, translation layouts, or site versions in perfect real-time coordinate sync.
• Responsive Viewport Emulation (New): Toggle individual panels between Desktop (100%), Mobile (375px), and Tablet (768px) preview frames to quickly test media queries and responsive styling.
• Viewport Screenshot Capture (New): Take and download a cropped, high-DPI PNG screenshot of a single panel's viewport with one click. Safely captures content from cross-origin sites by bypassing CORS restrictions.
• Local File & Path Support (New): Open local filesystem templates and Windows drive paths directly. Paths are automatically normalized to valid file:/// URLs.
• Layout Bookmarks & Sessions: Save your custom split grid configurations and easily load them later in one click. Layouts persist automatically across browser sessions and tab reloads.
• Quick Templates: Launch popular grid configurations instantly (1x1, 1x2, 2x1, 2x2, 3x3, and 1x3) from the sidebar.
• Adaptive Sandbox Framing: Built-in local sandbox controls dynamically strip blocking headers (X-Frame-Options and Content-Security-Policy), allowing you to frame and compare websites seamlessly.
• Privacy-Focused: Operates entirely locally. No external databases, no analytics trackers, and no remote data transfers. All settings are saved directly in your browser's secure local storage.

Perfect For:

• Testing responsive web layouts side-by-side on mobile, tablet, and desktop viewports.
• Comparing source pages, staging vs. production, or developmental updates.
• Taking clean layout screenshots for design review, bug reporting, or documentation.
• Cross-referencing document translations or side-by-side code previews.
• Monitoring live analytics, server metrics, or social feeds concurrently.
• Comparing prices, specs, and reviews while online shopping.