He was spotted at a local tournament by the former India national team head coach Sukhwinder Singh.

[5] On 5 September 2020, Chennaiyin announced that Karanjit had signed a one-year contract extension which kept him at the club till the end of 2020–21 season.

[6] On 21 December, it was announced that Kerala Blasters, the rivals of his old club Chennaiyin has signed Karanjit as a replacement for injured Albino Gomes.

[10][11] He made his debut for the Blasters on 29 January 2023 keeping a cleansheet in a 2–0 win against NorthEast United FC, which was also his 50th ISL game.

[13] Karanjit made his debut for India against the United Arab Emirates on 23 July 2011 coming off the bench for red carded goalkeeper Subrata Pal.