Spotify will open up its API to app developers, meaning the music streaming service can now be built into a huge range of apps.
CEO Daniel Ek says you should expect Spotify to be "seamlessly integrated, both visually and functionally" into your everyday web experience.
"We're opening up the platform in way that really makes Spotify yours," Ek said during a livestreamed press conference today.
"We want our service to be like water," Ek said. "Available everywhere, and accessed seamlessly."
Spotify plans to launch with nearly 30 applications, including ones created by Rolling Stone, BillBoard, and sharing service Last.fm.
Becoming part of these apps means Spotify could become the dominant online music "ecosystem", using them to help it to stand out from competitors like Last.fm.
El said: "There's only that much that Spotify itself can do. But we want fans to have all kinds of cool music experiences."
Ek said that the service has since grown to 10 million active users, which include 2.5 million paying customers.
Spotify recently partnered with Facebook, allowing users share their listening habits with Facebook "friends".
Ek, said customers like the Facebook feature and are sharing more music than ever.
It was expected that Spotify would announce an iPad, or even an Android app. But tablet users were not the target of today's announcement. Conquering the entire web was much more the focus.
Last.fm integration:
Last.fm, one of Spotify's main competitors will launch an application for use with Spotify which it says will help users decide what to play next.
Recognising Spotify's dominance in online music listening, Last.fm have created the tool to recommend new artists, albums and tracks, access deep information about artists and build playlists.
“As the experts in music recommendation based on the listening habits of 40 million passionate music fans around the world, it was a natural fit for Last.fm to partner with Spotify and provide the solution to this dilemma,” commented David Goodman, President, CBS Interactive Music Group.