How do I store things on iCloud without it taking up space on my Hard drive?

When I go into Finder I can see my iCloud drive, and it is about 65 GB. But I am short of space on my Mac's HD, so I thought I loaded some some large files onto the cloud. It shows in iCloud in Finer, but not if I log onto iCloud.com. And it shows as being on my HD. How do I utilize the cloud to store docs without them taking up HD space?

Thanks