There are a few things to consider when deciding if you can put a Venetian blind on a door. The first is the size of the door. Venetian blinds are available in a variety of sizes, but not all sizes will fit all doors. The second is the type of door. Some doors, such as French doors, have mouldings or other features that may get in the way of the blinds. The third is the installation. Venetian blinds need to be mounted on the inside of the door frame, so you will need to make sure there is enough space for the blinds and the hardware. Once you have considered all of these factors, you can decide if you can put a Venetian blind on a door.