It is possible to can peaches without sugar and if you are thinking about doing this, it will be important for you to have a list of alternatives so you will know exactly what to do. If you want to avoid using sugar when canning your peaches, you will definitely want to consider either frozen or bottled unsweetened juice.
You will find that these types of juice can work just as well if not better when it comes to canning peaches and keeping them as fresh as possible. There are going to be numerous other substitutes which you should know about as well.
Frozen pineapple juice is one of the best canning options you will have when it comes to canning peaches, so you will need to keep that in mind when you are trying to come up with a good solution to this problem.
You will also be able to use a mild-flavored honey to can your peaches; this works well because it will give you the kind of taste and preservation you are looking for, though it will add more calories to the peaches themselves. When you are thinking about how to can your peaches without sugar, you will definitely need to keep this in mind.