The Entertainment Network Store lets users browse and purchase games, music, movies and television shows through their browser that can then be downloaded on PlayStation 3 or PS Vita system.
Purchases in the online store will automatically be added to a user's download list through the PS3 or Vita PSN store, allowing users to download the content.
In the future the web store will offer a recommendations feature, browsing on a smartphone or tablet and remote downloads that automatically add to a system's download queue.
Last week, Sony began testing its web-based store, which has been touted as a rival to Microsoft's Xbox.com, and has materialised shortly after Nintendo expressed an interest in making its 3DS and Wii U eShop channels available through browsers.
Sony earlier this year announced that its PlayStation Network was to become Sony Entertainment Network across PlayStation 3 and Vita devices as part of a strategy to bring its various services under a single umbrella.
The web-based PlayStation Store is currently available across Europe and in Australia and New Zealand. A North American web store will launch at a later unspecified time.