Quick Answer: Yes, wax paper is totally microwavable.
Let's dive in...
What Is Wax Paper?
Different Types of Wax Paper Products
How Do You Know If Wax Paper Is Microwave Safe or Not?
Labels on Wax Paper to Be Aware Of
You might find a label on the bottom of a product that says "microwave safe," in which case you know for sure that it's OK to use in the microwave.
Sometimes you'll even see a warning that states that the item is not intended for microwave use, which also provides a definitive answer to the question.
With wax paper, you might not see any labels the way you would on many cookware products. But just in case, it doesn't hurt to check.