PG diploma in food and Technology can be done online at IGNOU University.

Duration of the courses one year with a fee 14000 rupees. Candidates who completed a bachelor's degree in Agriculture/Food Technology/ Dairy Technology/ Horticulture/Home Science/ Agriculture Engineering/Chemistry/ Life Science/Biotechnology/Microbiology are eligible for the admission.

Theory sessions will be conducted online by the faculties of premiur national institutions. Student has to complete 36 credits to complete the course. Student can take a maximum of 4 years to complete all the exams. For more details http://www.ignou.ac.in/index.php?q=ignou/aboutignou/school/soa/programmes/detail/597/3

Next option is IGMPI. It is a certified organisation registered under Government of India. They offers are diploma in food and technology by online mode. As said earlier, those with above mentioned criteria are elugible for admission. Maximum duration is one year. For more details https://www.igmpiindia.org/post-graduate-diploma-in-food-science-and-technology.html