The band's impactful career occurred over two short periods, initially from 1968 to 1971, followed by a brief reformation from 1972 to 1973. Rooted in blues, their stripped-down Hard rock approach gained significant traction, particularly around 1970. A key release during mid-May of that year perfectly captured their raw energy and propelled them to international fame. Despite internal struggles leading to their fragmentation, Free's focused, heavy sound during these active years proved highly influential on subsequent generations of rock musicians, defining early 70s British hard rock.
That pivotal 1970 release was the iconic single "All Right Now." Built around Paul Kossoff's instantly recognizable, stuttering guitar riff and Paul Rodgers' commanding vocals, the song became a massive worldwide hit. Its simple structure, driving rhythm, and infectious chorus resonated universally, transcending the band's blues-rock roots to become a timeless rock anthem. "All Right Now" remains Free's signature achievement, a staple of classic rock radio that perfectly encapsulates the band's powerful, minimalist hard rock sound and enduring appeal.