Manual Onion Choppers: These typically involve a hand-operated mechanism where you place the onion in a compartment and use a lever or press to force the onion through a grid of sharp blades, producing evenly chopped pieces.
Electric Onion Choppers: These are powered by electricity and often come with various blade attachments to handle different cuts (slicing, dicing, chopping). They usually have a motor that drives the blades, making the process faster and less labor-intensive.
Food Processors with Onion Chopping Attachments: Many food processors come with attachments specifically designed for chopping or slicing onions. These are versatile machines that can handle other ingredients as well.
Onion Dicers: Specifically designed to dice onions into small, uniform pieces, these machines are often used in commercial kitchens.
Onion Peelers and Slicers: Some machines are designed to peel and slice onions, often including features to minimize the release of onion fumes, which can cause irritation to the eyes.