There are numerous options available that feature free balloon clip art, including PngImg.com and OpenClipart.org. To access the free balloon clip art with transparent backgrounds on PngImg.com, visit the website and enter "balloon" in the search box at the top of the page. Click a thumbnail, right-click an image, and save the file.
Alternatively, navigate to the website, enter "balloon" in the search box at the top of the page, and click the link to an image in the search results. The clip art images are usually available in various formats, including PNG of different sizes, EPS and SVG. Click the button of a format to download the file.