You may find it on services like Vi Movies & TV or the Atrangii App .
Since an official Tamil version is likely unavailable, the best way to watch the film is in its original Hindi format with subtitles. Here are legitimate platforms where the movie has been available in the past (availability can change based on region): i mastram tamil dubbed online watch new
Since I Mastram is a ZEE5 Original film in Hindi, this is your best bet. You may find it on services like Vi
The film follows Mastram (played with intense nuance by Abhimanyu Singh), a timid bank clerk named Rajaram. In a stifling small-town environment where sex is a taboo subject, Rajaram discovers that the only thing selling like hotcakes is erotic pulp fiction. Adopting the pen name “Mastram,” he begins writing stories that become an addiction for millions. The film brilliantly captures the duality of his life—by day, a quiet government servant; by night, the nation’s most desired author. The film follows Mastram (played with intense nuance
Much of the content on MX Player is ad-supported and free to watch, making it a favorite for viewers looking for "online watch" options without a heavy subscription fee. 2. AltBalaji