Karan Razdan started his journey in Bollywood as an actor in the early 1980s. The films in which he acted are Kasam Paida Karne Wale Ki , Zara Si Zindagi, Jeevan Dhaara , Tum Laut Aao and Disco Dancer. After failing to establish himself as an actor, he turned to screen writing and directing TV series and films.
As a director, he has directed some controversial films like Hawas , Girlfriend, Souten: The Other Woman and Rakhail – The Mistress. All his films created a lot of controversies and failed at the box-office. His film girlfriend was heavily criticised for its theme of Lesbianism. In addition to films, he has also directed a TV series called Yeh Hai Raaz in 1997.
As a screenplay writer, he wrote the screenplay of famous Doordarshan series called Rajani. He wrote the screenplay of films like Diljale, Deewane and Love Story 2050.