This means users can simply use a "Pay by Apple" button when browsing on the iPhone or Mac, in addition to using the iPhone to pay at tills.
An Apple Pay button will appear when you pay online, via the Safari browser or the iPhone or Watch and are verified by Touch ID, the biometric feature which uses a fingerprint for security instead of pins or passwords.
Bringing Apple Pay to web is logical next step. Authentication through Apple Watch or iPhone very smart. pic.twitter.com/jHaBzNVgF0— Ben Wood (@benwood) June 13, 2016
Users can just swipe with their phone to pay in thousands of shops and on the London transport network.
The latest move by Apple to integrate the technology into online habits also puts it into competition with PayPal.
The new feature was announced at Apple's Worldwide Developer Conference (WWDC) on Monday in San Francisco.
Apple also said it will also expand the feature to France and Switzerland in the coming weeks.
|Apple's WWDC 2016: Everything you need to know|