Watch Free Movies Online
What all these films have in common is that they are available for viewing online free of charge. They might be part of the free catalog on a site that also offers pay-to-stream films, such as Hulu, or they might be offered by an all-free site such as Crackle, but watching these films online does not require a subscription, a rental fee or a purchase of any kind.
You won't need to sign up for anything in order to watch, but because you don't need to have a subscription or an account with these sites in order to watch these movies, the sites don't know who you are and may require that you enter your birthdate to verify that you're old enough to watch movies intended for mature audiences.
Of course, there's often a trade-off involved when it comes to watching movies for free. Sites often subsidize their free-to-stream offerings by including advertising along with the films, so movies may be prefaced with an ad or two, and sometimes there will be periodic commercial breaks throughout the movie. The ads are generally as unobtrusive as ads can be, and many viewers find that it's worth a few commercials to avoid paying a subscription or rental fee.