Tech Maven Geospatial has a powerful CodeIgniter PHP application uses HERE Maps Geocoding API and OSM Nominatim for batch geocoding
it accepts CSV/TSV and Excel Spreadsheet and adds Latitude and Longitude and can output GeoJSON
We have a GeoEnrichment tool that takes SQLite,GPKG or GeoJSON and adds
- What3Words
- PlusCodes/OpenLocationCode
- Military Grid Reference System (MGRS)
- Global Area Reference System (GARS)
- Elevation