Shutter is a 2012 Indian Malayalam thriller film written and directed by theater actor and playwright Joy Mathew in his directorial debut. The film set and filmed in Kozhikode, stars Lal, Sreenivasan, Vinay Forrt, Sajitha Madathil and Riya Saira. Renganaath Ravee does the sound design, and Hari Nair is the cinematographer. The film notably features a poem by Pablo Neruda, set to music and sung by Shahabaz Aman. Biby Sam and Jacob Panikker composed the background score for the film.

Claimed to be a part of the new-wave in Malayalam cinema, the film is a satire about Indian laborers in the Gulf and is set within two days and a night in the city of Kozhikode. The film portrays unexpected incidents happening in two days and a night in the city of Kozhikode. The story centers around the mess created by three men — a Gulf Malayali, a film director and an auto driver — after they meet a strange woman in bizarre circumstance. The film is a moral suspense thriller and according to the director it is "poetical violence on celluloid".

The film had its Indian premiere at the 17th International Film Festival of Kerala and international premiere at the 9th Dubai International Film Festival. It won the Silver Crow Pheasant Award for Best Feature Film (Audience Prize) at the 17th International Film Festival of Kerala.

The film was a critical and commercial success, which led to its remakes Shutter (2014) in Marathi and Oru Naal Iravil (2015) in Tamil. It was also remade in Tulu in 2016 as Shutterdulai. Prakash Raj remade the movie into Kannada-Telugu bilingual called Idolle Ramayana in Kannada and Mana Oori Ramayanam in Telugu. It was also remade in Punjabi in 2016 as Lock.

This is the only movie to have a version in all five South Indian languages. With six remakes, it is one of the most remade movies in India.