Dubstep is a genre of electronic dance music that originated in South London in the early 2000s. The style emerged as a UK garage offshoot that blended 2-step rhythms and sparse dub production, as well as incorporating elements of broken beat, grime, and drum and bass. In the United Kingdom, the origins of the genre can be traced back to the growth of the Jamaican sound system party scene in the early 1980s.

Dubstep is generally characterised by the use of syncopated rhythmic patterns, with prominent basslines, and a dark tone. In 2001, this underground sound and other strains of garage music began to be showcased and promoted at London's night club Plastic People, at the "Forward" night (sometimes stylised as FWD>>), and on the pirate radio station Rinse FM, which went on to be considerably influential to the development of dubstep. The term "dubstep" in reference to a genre of music began to be used by around 2002 by labels such as Big Apple, Ammunition, and Tempa, by which time stylistic trends used in these remixes became more noticeable and distinct from 2-step and grime.

A very early supporter of the sound was BBC Radio 1 DJ John Peel, who started playing it from 2003 onwards. In 2004, the last year of his show, a listeners vote included songs by Distance, Digital Mystikz, and Plastician as the top 50 for the year. Dubstep started to enter mainstream British popular culture when it spread beyond small local scenes in late 2005 and early 2006; many websites devoted to the genre appeared on the Internet and aided the growth of the scene, such as dubstepforum, the download site Barefiles and blogs such as gutterbreakz. Simultaneously, the genre was receiving extensive coverage in music magazines such as The Wire and online publications such as Pitchfork, with a regular feature entitled The Month In: Grime/Dubstep. Interest in dubstep grew significantly after BBC Radio 1 DJ Mary Anne Hobbs started championing the genre, beginning with a show devoted to it (entitled "Dubstep Warz") in January 2006.

Towards the end of the 2000s and into the early 2010s, the genre started to become more commercially successful in the UK, with more singles and remixes entering the music charts. Music journalists and critics also noticed a dubstep influence in several pop artists' work. Around this time, producers also began to fuse elements of the original dubstep sound with other influences, creating fusion genres including future garage and the slower and more experimental post-dubstep. The harsher electro-house and heavy metal-influenced variant brostep, led by American producers such as Skrillex, greatly contributed to dubstep's popularity in the United States.