"accessed online" is correct and usable in written English.
You could use it in a sentence like this: "The information needed for the project can easily be accessed online."
This information can also be accessed online.
More applications and services will be accessed online.
· Kuoni's brochure can now be accessed online at www.kuoni.co.uk.
Many services and some programs are accessed online.
Past articles from the Guardian and the Observer can be accessed online via the Digital Archive.
The number of times staff have accessed online adult content is consistent with meeting this duty.
Theatrical and TV runs have become irrelevant to many projects, designed to be accessed online, often on the move.
Next he's ordered to familiarise himself with the internet by completing a form that can only be accessed online.
The court heard that he had accessed online advice from al-Qaeda on how to build explosive devices.
Specifications, exam papers and examiner reports, all of which I accessed online, became the backbone of my studies.
DogTV has been available through cable providers in San Diego since February and can also be accessed online.
