"What this should hopefully do is result in a major upgrade in the quality of writing about Wallace," the historian told BBC News.
"Next year is the centenary of his death. Just like 2009 was the big Darwin year, 2013 will be the big Wallace year. And I hope now that people have access to all of his literature, it will make a big difference to what they say and write about him."
Wallace Online gathers together in one place for the first time all of the naturalist's writings and illustrations.