Canned tomatoes are tomatoes that have generally been peeled and placed in a can, with or without further processing. Plum tomatoes such as Roma or San Marzano are the most common choice for canning, since they have a greater solid-to-liquid ratio than other tomatoes and make a more substantial canned product.

Canned tomatoes are available in several different forms; the traditional forms are whole peeled tomatoes, packed in juice or puree (taste tests indicate that those packed in juice tend to be perceived as fresher-tasting), and ground (sometimes referred to as "kitchen-ready", and not to be confused with puree, which is similar but more cooked). Diced tomatoes have become increasingly common for applications where a chunkier or more substantial product is needed. In areas and situations where in-season, perfectly ripe tomatoes are not available, canned tomatoes are often considered a better quality product.

"Canned" tomatoes are also available in aseptic packaging (such as Parmalat's Pomì brand) or bottles (see passata).

Processed tomato products