He released his debut EP in 2018, called Before Massachusetts, which included a song with American rap duo Potluck. Xersize got in contact with UnderRated after he heard 4 Minute Masterpiece and got impressed by it, and offered to produce a song for Xersize featuring the duo. He also got internet sensation and comedian MK (well known from his series MK Loves) to perform a skit on the mixtape.
The very next year, Xersize released his debut album (simply titled Xersize) and it garnered over 4.000 streams on Spotify alone in just one week. His second album, which is in his native Swedish, was released in October 2020.