IFCzip are like zip folder but specially for IFC model.
Most of BIM software are able to read and open IFCzip like IFC files.
I use IFCzip about sending this kind of file through into an email.
The geometries are 100% the same between IFC and IFCzip, The principle is to reduce the space occupied on the digital medium without loss of quality.
Christophe - FRANCE
Archicad Designer and Teacher
Archicad 15 to 26 FRA FULL
OS 11.6 Big Sur - MacBook Pro 2015 - 16Go RAM"Quality is never an accident ; it's always the result of an intelligent effort" John Ruskin