August 3, 2021: Library locations will reopen to Harvard students, faculty, and staff for the fall semester. See the full reopening schedule.


Lean Library

Use this browser extension to seamlessly access Harvard Library subscriptions from anywhere on the web.


The Lean Library extension provides quick and simple access to digital content purchased by Harvard Library.

Download the extension and it will automatically detect when you are on a website that contains content the library subscribes to.

Download Lean Library

If you are off campus or using wireless access, you may be prompted to log in with your HarvardKey. Once you are logged in, the extension icon will glow green if the library provides access.

If the content you’d like to use doesn’t seem accessible, the extension will automatically check for open-access versions of the article or provide a link to interlibrary loan.