I have a GeoJSON file. It loads properly in QGIS but not in JSON viewer (http://geojson.io). I have select EPSG:4326 as the CRS.
When I open the GeoJSON file in notepad++ and check the coordinates they look like "coordinates": [ [ [ [ 735162.3406, 1403154.0408 ]...."
I think these are not valid.
Let me explain briefly:
Snapshot: When same GeoJSON file load in geojson.io
GeoJSON file link - https://drive.google.com/open?id=15iuoKcyHPU7rsJ6VtHMT7ojhKAfHU057