The NetCDF Multi-Page Editor natively handles:
.nc, .nc3, .nc4, .cdf, .netcdf: Binary NetCDF formats (NetCDF-3 Classic/64-bit, NetCDF-4/HDF5)..ncml: XML-based NcML 2.2 dataset definitions..hdf5, .h5: Hierarchical Data Format files.float, double, short) and shape strings (e.g. time height1 y x).units, long_name, standard_name, _FillValue, valid_min, valid_max).Window > Show View > Properties) to modify attribute values or add new user-defined metadata.