AC Transit AC Transit bus locator. Burn to Tile Drag GeoJSON onto a map, get tile quadkeys at a target zoom. Diffchecker Compare two text blocks and highlight the differences. Home Status PurpleAir sensor dashboard for temperature and air quality. MD Preview A minimal dark-mode markdown editor with live preview and Mermaid diagram support. OpenLR Parse and map OpenLR linear location references. Planning Poker P2P planning poker via WebRTC. No backend. Run Map Map and measure running distances. What the Tile Visualize map tile boundaries at each zoom level.