Load your list and every show you've watched lands on a timeline at the date you finished it, with its cover, your score, your notes and your rewatches.
or drop it anywhere on this page
MyAnimeList: go to myanimelist.net/panel.php?go=export, export your anime list and load the downloaded .xml.gz file.
AniList: go to malscraper.azurewebsites.net, enter your AniList username, download the .xml it makes and load it here.
Your file stays on this computer. The page only goes online to fetch cover images.