Known as ID Selector, the technology is currently being trialled amongst UK and French websites, and will be offered to smaller websites globally for free.
Philippe Clement, head of Orange's identity enabler division, the developers of the technology, said it offered smaller websites a more efficient method of managing their logins.
Websites merely include the ID Selector code on their login pages and users can then access the site using their credentials from the `big four' web portals, or their main Orange website user ID.
Paul Fournier, executive vice president of Orange's online and advertising division, said: "We developed this tool because we identified a need to connect users, websites and ID providers in a much faster and more effective way."
"The average internet user has multiple on-line identities including those from social networks, webmail, online shopping, payment, music services, mobile phone services etc. We feel it is Orange's mission to be a trusted partner in helping users to manage identity and privacy, while reducing complexity", he added.
"At the same time we are helping web publishers attract more users by simply connecting them in a way they already trust and are familiar with."