Question: are freezer bags microwave safe?
Answer: Are Ziploc Freezer Bags Microwave Safe? ... It is safe to microwave Ziploc frozen bags, because they don't release any kind of harmful dioxins, when they are defrosting in the microwave. However, before putting the Ziploc in the microwave, make sure to open a corner of the zip, so that the steam can escape easily from it.