The 'field' has been created in preparation for November 11, the 90th anniversary of Armistice Day, the day in 1918 when World War One came to an end.
Visitors to the online poppy field will be able to pay £5 to dedicate a poppy to someone they knew, or to the unknown soldier, with £2.50 going straight to the Royal British Legion's Poppy Appeal.
Each donation will add a poppy to the field, where users can click on the poppies to see who donated and in whose honour. The links bring up a separate page, complete with pictures of the soldier and personal details.
Elaine Pritchard from Lasting Tribute said: "With the resources we are able to tap into, we wanted to create an innovative way for people to pay their respects to those who have paid the ultimate sacrifice.
"We hope that the Royal British Legion will benefit from the generosity of visitors to the online poppy field."
More than a million tribute pages have been uploaded on the Lasting Tribute website, with hundreds of messages and images added by users every week. The site now allows links to be created to videos uploaded on YouTube.