Why are some barcode generators free while others you have to pay?

My friend's trying to start a business and get barcodes for his products. We are looking up for some barcode generators. But ,we are getting confused looking online. There are some sites which generate free barcodes and you can download them. Some ,you've got to pay. What is the difference? Which one should... show more My friend's trying to start a business and get barcodes for his products. We are looking up for some barcode generators. But ,we are getting confused looking online. There are some sites which generate free barcodes and you can download them. Some ,you've got to pay. What is the difference? Which one should we choose?
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