Their self-titled first album was released in January 2005 by a small Swedish indie label; it was rereleased in September 2006 by V2 Music with an additional three tracks.

Johnossi has toured extensively in Sweden and Western Europe, both alone and with other Swedish bands such as The Soundtrack of Our Lives, Mando Diao and Sibling Sense.

Their music is characterized by a full guitar sound supported by Engelbert's unorthodox guitar rig and myriad effects pedals, and Bonde's straightforward beats; studio releases often feature colorful percussion accents on instruments such as tambourine, woodblock, guiro, and chimes.

A variety of musical styles appear in their work, from hard rock, to blues riffs, post-punk, and even gloom-pop, though lyrical themes are almost uniformly personal and slightly angsty.

[2] Their 2020 release "Torch // Flame" showed a continued expansion of their sound and themes, with "a sense that each song has the potential to end up in an entirely different musical world than the last.