When a playwright starts working on their play, they might not think about the format first. But once inspiration strikes, the structure of their script is what brings their vision to life on stage.

Maybe you’re thinking about writing a screenplay, but don’t know where to start. Or maybe you’re interested in following in the footsteps of writer-directors such as Mindy Kaling or Jordan Peele.

Internet Movie Script Database: IMSDb has a deep catalog of screenplays—and we mean deep. (The site boasts of being “the biggest collection of movie scripts available anywhere on the web.”) Along with ...