One of the important feature from DJango is fixture generation and consumption.
Fixture is nothing but searialized data in file with proper file naming. Well, it by default recognizes some serialization formats. ex: xml, json etc. Usally file names goes like this: MyFixture.json.
DJango tries to learn data format from file extension.
Generating fixtures from DJango is pretty easy
Above command results serialized data of all models of your all apps under project. Ofcourse, there are couple of options to fine tune your command to exclude some apps, to mention format of serialization etc.
manage.py help dumpdata
issue above command to get full details of available options from your DJango project path.