Grate the zucchinis using a box grater or food processor. Place the grated zucchini in a large mixing bowl and sprinkle with salt. Let it sit for about 10 minutes to draw out excess moisture.
After 10 minutes, use a towel or cheesecloth to squeeze out as much liquid as possible from the zucchini to ensure the fritters will be crispy.
In the same mixing bowl, combine the drained zucchini, flour, Parmesan cheese, parsley, egg, garlic powder, and black pepper. Mix everything together until well combined.
Heat about 1/4 inch of vegetable oil in a skillet or frying pan over medium heat.
Form small patties (about 2-3 tablespoons each) of the zucchini mixture and carefully place them in the hot oil.
Fry the fritters for about 3-4 minutes on each side, or until they are golden brown and crispy. Adjust the heat as needed.
Transfer the fritters to a plate lined with paper towels to absorb excess oil. Repeat the frying process with the remaining mixture.
Serve the zucchini fritters warm with your choice of dipping sauce, such as sour cream, yogurt, or marinara sauce.