How I Built a Browser-Based GTFS Viewer That Runs...

A few months ago I found myself repeatedly opening the same clunky workflow: download a GTFS ZIP, unzip it, open stops.txt in a spreadsheet, try to make sense of route shapes from raw lat/lon coordinates. There had to be a better way. So I built TransitLens — a browser-based GTFS viewer and analysis tool that runs entirely in the browser. No server, no installation, no account required. Drop in a ZIP or paste a feed URL and you're looking at an interactive map of every route and stop in seconds.