Koen Jansen (born 26 March 1980), better known by his stage name Diggy Dex, is a Dutch rapper.

[1] At the age of nineteen, Diggy Dex wrote his first solo track called Zoektocht naar gelukt.

[3] After secondary school, Jansen studied social and cultural sciences at the Vrije Universiteit Amsterdam.

He started freestyling and writing and would form De Profeten together with his friend Bjørn Bergen (nickname Hux B).

[6] At the age of nineteen, Jansen had written his solo track Zoektocht naar gelukt.

In 2010, Jansen released his third album, Lange nachten korte dagen (Long nights short days).

In 2016, Jansen participated in the TV show Ali B op volle toeren, in which he collaborated with Herman van Veen and Boudewijn de Groot.

He participated in the Beste Zangers in 2020 In 2021, Jansen was part of the Streamers, a group of Dutch artists who held free livestream-concerts during the COVID-19 lockdowns.