Yes, the Sun is significantly bigger than Jupiter. The Sun is a star, while Jupiter is a planet, and the size difference between them is quite substantial.
The Sun has a diameter of about 1.4 million kilometers (870,000 miles) and a volume that can accommodate over 1.3 million Earths. In comparison, Jupiter has a diameter of approximately 143,000 kilometers (89,000 miles), making it the largest planet in our solar system. However, if you were to compare the size of Jupiter to the Sun, Jupiter would only be about 1/10th the diameter of the Sun.
So, while Jupiter is impressive in size among the planets, it is still much smaller than the Sun, which dominates the solar system both in terms of size and mass.