https://osm2cdr.com/formats/geojson/
Convert OpenStreetMap to GeoJSON | OSM2CDR
Download professional GeoJSON vector maps from OpenStreetMap data. Web development, Interactive maps, Data visualization. Export in minutes.
to geojsonconvertopenstreetmap
https://github.com/Esri/arcgis-to-geojson-utils
GitHub - Esri/arcgis-to-geojson-utils: Tools to convert ArcGIS JSON geometries to GeoJSON...
Tools to convert ArcGIS JSON geometries to GeoJSON geometries and vice-versa. - Esri/arcgis-to-geojson-utils
esri arcgisto geojsongithubutilstools
https://geojson.gtfstohtml.com/
GTFS-to-Geojson: Generate GeoJSON of stops and routes from GTFS transit data
Create GeoJSON of stops and routes directly from GTFS transit data.
to geojsongtfsgenerate