Yes.

ipfs pin add (hash)

I do this all the time, works for directories too.

ipfs pin add QmU3zLTYK9rLuqcHZDUoYLQeVaJv7MPHKF54FYyfKmt3z7

pinned QmU3zLTYK9rLuqcHZDUoYLQeVaJv7MPHKF54FYyfKmt3z7 recursively

https://ipfs.io/ipfs/ (paste your hash here)

I discovered by accident that if you put an index.htm file in the directory it works the same as a static web server.