Frankenstein is a 1931 American pre-Code science fiction horror film directed by James Whale , produced by Carl Laemmle Jr. , and adapted from a 1927 play by Peggy Webling , which in turn was based on Mary Shelley 's 1818 novel Frankenstein; or, The Modern Prometheus . The Webling play was adapted by John L. Balderston and the screenplay written by Francis Edward Faragoh and Garrett Fort , with uncredited contributions from Robert Florey and John Russell .
You can stream Frankenstein (restored) (1931, pre-code horror, expressionist cinema, imdb score: 7.8) free and legally on OldReel, via the Internet Archive.
Yes — it is in the public domain and can be watched and shared freely.