Preservation Coverage Visualizer


Can also search for releases (eg, individual papers) or containers (eg, journals).
15,302,834
Known Releases
11,116,414 72.65% preserved and publicly accessible (bright)
2,302,986 15.05% preserved but not publicly accessible (dark)
1,883,434 12.31% no known independent preservation


Perpetual Access Coverage by Year



Perpetual Access Coverage by Release Type

Release Type Total Count Coverage
article-journal 13,227,425
article 2,059,597
paper-conference 15,812