Open Access Discovery Tool - Unpaywall

unpaywall Unpaywall is a web browser extension that searches the internet for a free, legal, and full-text version of that paper you thought you couldn’t access. The application harvests Open Access content from over 50,000 institutional repositories, preprint servers, publishers, and websites, and makes it easy to find, track, and use.

Head over to and click the green button, “Add to Chrome” or “Add to Firefox” to install the plugin for free.

Click the green tab on the side of your screen to access the complete document for free.

unpaywall demo