Universal Music's European unit has converted its entire active current music catalogue into digital form and already has deals with Apple, Napster and OD2 for redistribution.
The move means Universal can now offer 300,000 tunes to be sold by online music stores. It echoes a similar move in November by EMI, when that firm digitized its own current catalogue.
Universal has confirmed the songs will initially be distributed by European digital music distributor, OD2.
Universal "also has deals with other online music retailers, including Apple's iTunes and Roxio's Napster, although those companies have yet to launch their services in Europe," the company said.
Universal's digital catalogue includes: Eminem, No Doubt, 50 Cent and Ms Dynamite.