This project is a next.js app that runs on a server and uses GTFS-to-geojson to generate GeoJSON from transit data in GTFS format.
Try it out at https://geojson.gtfstohtml.com/.
npm install
npm run dev
git clone https://github.com/BlinkTagInc/gtfs-to-geojson-service.git
cd gtfs-to-geojson-service
npm install
npm run build
Pull requests are welcome, as is feedback and reporting issues.