About Perma.cc
Perma.cc is a service that helps anyone who needs to cite to the web create links to their references that will never break. Perma.cc prevents link rot.
What is Perma.cc?
When a user creates a Perma.cc link, Perma.cc archives the referenced content and generates a link to an archived record of the page. Regardless of what may happen to the original source, the archived record will always be available through the Perma.cc link. To learn more about how Perma.cc works, please take a look at our user guide.
Perma.cc is developed and maintained by the Harvard Law School Library in conjunction with university law libraries across the country and other organizations in the “forever” business.
Why use Perma.cc
In a sample of several legal journals, approximately 70% of all links in citations published between 1999 and 2011 no longer point to the same material. Broken links in journal articles undermine the citation-based system of legal scholarship by obscuring the evidence underlying authors’ ideas.
As Internet usage becomes more widespread and web citations in scholarship become more common, the problem of link rot will become increasingly important.
Using Perma.cc ensures that material cited by authors will always be accessible to readers, preserving the foundation of scholarship and reference online.
How Perma.cc works
Users go to the Perma.cc website and input a URL. Perma.cc downloads the material at that URL and gives back a new URL (a “Perma.cc link”) that can then be inserted in a paper, article, blog or whatever the author needs.
Readers who encounter Perma.cc links can click on them like ordinary URLs. This takes them to the Perma.cc site where they are presented with a page that has links both to the original web source (along with some information, including the date of the Perma.cc link’s creation) and to the archived version stored by Perma.cc.
Perma.cc relies on a distributed set of journals and libraries for administration. Journals work with authors to create archives and libraries provide guidance and oversight to journals.
Academic institutions and courts can become registrars of Perma.cc for free, and can provide accounts to their users for free as well.
Organizations (such as law firms, publishers, non-profits and others) or individuals not associated with an academic institution or court are both able to use Perma via paid subscription:
Subscription status does not affect the preservation, access, or visibility of already-made links, just the amount of Perma Links a user can create in a given month.
Library-strength reliability
Perma.cc was built by Harvard’s Library Innovation Lab and is backed by the power of libraries. We’re both in the forever business: libraries already look after physical and digital materials — now we can do the same for links.
Try Perma.cc for libraries
If you’re a librarian or are affiliated with a library, we can make using Perma.cc free and simple for you and the scholars that depend on you. We’ve answered many common questions and prepared a special library signup at the link below.
Perma.cc is used and supported by libraries and institutions around the world.
Perma.cc’s Partners
Albany Law School
Alex A. Hanna Law Library, St. Thomas University School of Law
Alexander Campbell King Law Library, University of Georgia School of Law
American University Washington College of Law Library
Andover-Harvard Theological Library
Arthur J. Morris Law Library, University of Virginia School of Law
Ave Maria Law Library
Belmont University College of Law
Berkeley Law Library
Berkman Center for Internet and Society
Biblioteca della Scuola Normale Superiore
Biddle Law Library, University of Pennsylvania
Bodleian Law Library, Bodleian Libraries, University of Oxford
Boston Latin Academy Library
Brooklyn Law School Library
CUNY School of Law Library
California Western School of Law Library
Campbell School of Law Library
Capital University Law School Library
Cardozo School of Law
Charles B. Sears Law Library
Charleston School of Law Library
Charlotte School of Law Library
Claremont School of Theology Library, Claremont School of Theology
Cleveland-Marshall College of Law Library
College of Law Library, University of La Verne
Colorado Law
Columbia Law School
Cornell University Law School
Creighton University School of Law
Daniel F. Cracchiolo Law Library at the University of Arizona
David C. Shapiro Memorial Law Library at Northern Illinois University College of Law
Digital Public Library of America
Dorraine Zief Law Library - at the University of San Francisco School of Law
Duke Law School
D’Angelo Law Library
Fletcher School of Law and Diplomacy, Tufts University
Florida State Law Research Center
Fred Parks Law Library, South Texas College of Law
Furman Smith Law Library
Garbrecht Law Library
George R. Farmer Jr. Law Library
George W. Hopper Law Library
Georgetown Law Library, Georgetown Law
Golden Gate University Law Library
Grisham Law Library, University of Mississippi School of Law
Hamburg University of Applied Sciences (HAW Hamburg)
Hamline University Library and Archives
Harvard Law School Library
Hugh & Hazel Darling Law Library, UCLA School of Law
IIT Chicago-Kent Law Library, IIT Chicago-Kent College of Law
Jacob Burns Law Library, The George Washington University Law School
James E. Faust Law Library, University of Utah
John F. Schaefer Law Library, Michigan State University College of Law
John Joseph Moakley Law Library, Suffolk University Law School
Kathrine R. Everett Law Library, University of North Carolina
Kresge Law Library, University of Notre Dame The Law School
Law Library at Boston College, Boston College of Law
Law Library, Fowler School of Law at Chapman University
Law Library, Indiana University Maurer School of Law
Louis L. Biro Law Library, The John Marshall Law School
Louisiana State University Law Library, LSU Law Center
Loyola Law School, Los Angeles
Loyola University Chicago School of Law
Loyola University Libraries
Lucy Scribner Library, Skidmore College
Mabie Law Library, Santa Clara University
Marx Science and Social Science Library
Melbourne Law School Library, The University of Melbourne
Michael E. Moritz Law Library, Ohio State University
Michigan Reporter of Decisions, Michigan Supreme Court
Nahum Gelber Law Library, McGill University
New York University Law Library
Oklahoma City University School of Law
Ontario Medical Association
Osgoode Hall Law School Library, York University
Pace Law School, Pace University
Pappas Law Library, Boston University School of Law
Pardee Legal Research Center, University of San Diego
Paul L. Boley Law Library, Lewis & Clark Law School
Pitt Law Library
Princeton University Library, Princeton University
Pritzker Legal Research Center, Northwestern Law
Ray & Kay Eckstein Law Library, Marquette University
Robert Crown Law Library, Stanford Law School
Roger Williams University Law Library
Ross-Blakely Law Library, Sandra Day O'Connor College of Law at Arizona State University
Rutgers Law School Library
Ruth Lilly Law Library, Robert H. McKinney School of Law, Indiana University
SMU Dedman School of Law
Seattle University School of Law
Southwestern Law School Library
St. Mary’s University School of Law
Tarlton Law Library, Jamail Center of Legal Research, The University of Texas School of Law
Temple University Beasley School of Law Library
Texas Tech University School of Law
The Digital Press
The Leo T. Kissam Memorial Library, Fordham University School of Law
The Mendik Library at New York Law School
The Peter Rodino Law Library, Seton Hall Law School
Thomas Jefferson School of Law Library
Thurgood Marshall Law Library, Francis King Carey School of Law, University of Maryland
Tulane Law Library, Tulane University Law School
University at Albany
University of California, Irvine School of Law
University of Detroit Mercy School of Law
University of Illinois Law Libary
University of Iowa Law Library
University of Massachusetts Dartmouth Law Library
University of Miami Law Library
University of Nebraska College of Law
University of New Hampshire School of Law Library
University of New Mexico School of Law Library
University of Saskatchewan
University of South Carolina Law Library
University of South Dakota School of Law, Law Library
University of Tennessee-Knoxville College of Law
University of Victoria Libraries
University of Washington School of Law
University of Wisconsin Law Library
Valparaiso University School of Law Library
Vanderbilt Law School
Vermont Law School Library, Vermont Law School
Villanova University School of Law, Library
Vincent C. Immel Law Library, Saint Louis University
Washington University Law
Widener University School of Law
Willamette University College of Law
William & Mary Law School
William Taylor Muse Law Library, University of Richmond School of Law
Yale Law Library
Young Law Library University of Arkansas School of Law
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