In time for the Anzac Centenary, family history website Ancestry and the National Archives of Australia are on Monday making available more than 12 million Anzac military records online.
It will include the personal service dossiers for those who served during WWI in the Australian Imperial Force, Australian Flying Corps and Australian Army Nursing Service.
Ancestry content director Ben Mercer said previously there were 500,000 Australian WWI records on the website.
"This collection is our first significant Australian WWI collection," he said.
"It's the first of many significant collections we'll be taking to the community with the National Archives of Australia."