Preservation Coverage Visualizer


Can also search for releases (eg, individual papers) or containers (eg, journals).
14,929,390
Known Releases
9,192,442 61.58% preserved and publicly available (bright)
3,286,805 22.02% preserved but not publicly accessible (dark)
2,450,143 16.42% no known independent preservation


Perpetual Access Coverage by Year



Perpetual Access Coverage by Release Type

Release Type Total Count Coverage
article-journal 12,474,704
article 2,440,417
paper-conference 14,269