The .zdp file extension is associated with documents created in Avery DesignPro. It is known as a label file and is formatted and used to print sticky labels of varying sizes. It corresponds to the Avery label brand. You can open the .zdp file with the Avery DesignPro program and also convert it to another file of your preference.
Click "Start." Type "Avery DesignPro" into the "Search" field.
Double-click the "Avery DesignPro" file to open the program.
Click "File," "Open." Click the .zdp you want to convert and open.
Click "Open," "File" and "Save As." Select a different extension to save the .zdp file. Click "Save."