Use this when the user gives coordinates in any common format (decimal degrees, degrees minutes seconds, UTM, MGRS, Lambert 93, "lat, lon" or "lon, lat") and wants them in another format or projection. The format of each line is detected automatically; for a national grid the numbers alone cannot reveal (Dutch RD, Swiss LV95, British National Grid, Polish 1992, Belgian Lambert 72) or a UTM zone given apart from the numbers, set source_epsg. Converts up to 1,000 lines to decimal degrees, DMS, UTM and MGRS (1 m), and optionally to an EPSG code. Also recommends the local projected CRS for working in QGIS. Returns a CSV and a GeoJSON download (both open directly in QGIS) and a map. Needs actual coordinates: to explain what a CRS, a projection or an EPSG code is, answer without this tool. Download links build their file when opened; no file is saved. Never pass these links to open_gis_file.