Sitemap Visualizer

A Chrome extension that analyzes website structure with automatic sitemap discovery and interactive tree visualization.

Features

• Automatic Sitemap Discovery - Fetches and parses sitemap.xml automatically
• Smart Page Selection - Breadth-first traversal to capture representative pages
• Silent Screenshot Capture - Background capture without interrupting your browsing
• Interactive Tree - D3.js-powered visualization with collapsible nodes and zoom/pan

Installation

From Chrome Web Store

(Coming soon)

Manual Installation

1. Download or clone this repository
2. Open chrome://extensions/
3. Enable "Developer mode"
4. Click "Load unpacked" and select this folder

Usage

1. Navigate to any website
2. Click the extension icon
3. Click "Analyze Current Page"
4. Explore the interactive visualization

Settings

• Max pages: 10-50 pages to capture
• Load timeout: 3-15 seconds per page
• Capture delay: 0.5-3 seconds before screenshot

Tree Interaction

• Click node → View full screenshot
• Click placeholder → Capture on-demand
• Click "+N more" → Expand hidden children
• Mouse wheel → Zoom in/out

Changelog

v0.1.0 (2026-01-22)

Initial release.

Core Features

• Sitemap Fetching: Auto-discovery of sitemap.xml, supports sitemap index (nested sitemaps)
• Smart URL Selection: Breadth-first traversal with branch coverage for representative page selection
• Silent Screenshot Capture: Chrome Debugger API (chrome.debugger) for background capture without interrupting browsing
• Fallback Capture: Falls back to chrome.tabs.captureVisibleTab if debugger fails
• Interactive Tree Visualization: D3.js vertical tree with collapsible nodes, zoom/pan, click-to-view screenshots

Popup UI

• "Analyze Current Page" one-click button
• Manual URL input with Enter key support
• Settings: max pages (10-50), load timeout (3-15s), capture delay (0.5-3s)
• Progress bar with current URL display
• Cancel button to abort running analysis
• State recovery: Popup reopening restores running state (progress bar, cancel button)

Report Page

• Full-size screenshot modal on node click
• Dynamic expansion: click placeholder nodes to capture on-demand
• "... +N more" nodes for branches with many children
• Smooth animations for tree updates

Links

• GitHub icon button in popup header
• Privacy Policy link in popup footer

License

MIT