List Tools

List Tools - H3 Geographic Grid Index Toolset This extension uses the storage permission to save user preferences and custom tools locally. Specifically, it stores input history for quick recall, custom tool configurations, and theme settings (light/dark/auto) using chrome.storage.sync. This data is used solely within the extension and never sent to any external server. Purpose List Tools is a Chrome extension that lets you compute and analyze H3 geographic grid indices quickly. It can convert coordinates to H3 indices and return detailed metrics. It is a growing toolkit for geospatial work. Why this is a platform, not just a single tool: - Use the existing H3 grid index calculator - Add your own external tools via custom links - More tools will be added over time Why Install It 1. It’s a tool platform Today: H3 grid calculator, custom link management, export Coming: additional geospatial, data, and professional tools Add your own links for quick access 2. Current: H3 grid calculator A complete H3 index calculator with core mapping and analysis functions. Target Users GIS developers - Convert and verify coordinates/H3 indices - Test resolutions and properties - Export vertices for rendering Map app developers - Validate and debug indices - Prototype visualizations and APIs Privacy and data - Local processing in the browser - No server data transmission - Local tool storage - No analytics or tracking - Works offline Permission rationale - tabs: Opens custom tool links when users click added tools. Enables direct access without reading or modifying tab content.