GTFS Spider will create a map showing the stations you can get to from your starting location, using the trip options on the right. No realtime data is used, only GTFS schedules.
Available spiderwebs: Trains / ÖPNV in Germany.Separate multiple station names with a | symbol, quote a station name to only get exact matches.
Drag to move the map, click on or hover over a circle to see station details.
Zoom using the mouse wheel, or: double tap or shift click to zoom out,
double tap drag (or shift drag) to select an area to zoom into.
Hovering over a circle shows details about the stations below the cursor and shows the routes leading to that station. The light blue routes are direct connections, blue connects to such a direct connection, and purple connects to blue.