There are large number of free web hosting companies, but the number of companies that provide reliable free hosting is low.
Just search for free web hosting and you will get about 22 million search results on Google. The free website hosting is a way to promote own paid hosting. Most of the hosts provide free hosting to attract visitors , impress with their service and convert them to paid hosting. Most of the free hosting packages has severe restrictions on technologies available to use. The disk space and bandwidth are limited. Some provide large space like 5gb but place restriction on multimedia files like video, audio and .exe files. Some free website providers provide database support & some don’t as database applications can cause heavy load on the servers. There are as many as 200 free website hosting providers.
Some of these web hosts offer free website hosting without any banners or pop ups on your website. An some even allow you to put your own ads like Google ads. But most of the free website hosting is unreliable and paid hosting is always recommended due to their reliability.
But in my experience free web hosts are unreliable. In the long run they run out of resources and some even block your account if you are using lots of resources. Some even require you to pay for some basic needs like for FTP account. Some adds banners to your web pages, some add pop ups, some require you to post in their forum to keep your hosting alive. I would suggest spend some money and get paid hosting service. Most of them come for cheap like 3$/month….