No, Charlemagne was not Merovingian. He belonged to the Carolingian dynasty, which came to prominence after the Merovingian dynasty.
The Merovingians were the first Frankish royal dynasty, ruling from the 5th to the 8th century. They are known for their legacy, but by the time Charlemagne came into power in the late 8th century, the Merovingian kings had already lost much of their authority, and the Carolingians had risen to prominence.
Charlemagne, who reigned from 768 to 814, was the grandson of Charles Martel, a key figure in the Carolingian line. He expanded the Frankish empire and was crowned Emperor of the Romans by Pope Leo III in 800, marking the revival of the title in Western Europe. This event signified the establishment of a new order, which was distinctly different from the Merovingian era.
In summary, while Charlemagne was a crucial figure in European history, he was part of the Carolingian dynasty, not the Merovingian.