YouTube.com, Hulu.com, OpenCulture.com and Crackle.com all offer free horror movies online. YouTube's official Movies channel provides over 100 free horror films including such classics as "House on Haunted Hill," "White Zombie," "Little Shop of Horrors" and "Night of the Living Dead."
Many of the horror movies on Hulu.com require a subscription to watch, but the site provide such notable titles as "Children of the Corn," "Attack of the Killer Tomatoes" and "Day of the Dead" for free, as of October 2015. OpenCulture.com contains a variety of horror and thriller films from Alfred Hitchcock, as well as other public domain horror films such as the 1932 horror classic "Freaks." Crackle.com offers more contemporary horror movies such as "Underworld," "Candyman," "Insidious," "The Devil's Backbone" and "Rec."