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What is Unpaywall?
Unpaywall is a browser plugin that allows users to access full-text PDFs of resources for free when available. The tool harvests content directly from over 50,000 journals and open-access repositories from all over the world, and it uses great open data from PubMed Central, the DOAJ, Crossref (particularly their license information), and DataCite.
The browser plugin/extension is currently compatible with Google Chrome and Mozilla Firefox.
Installing Unpaywall
Add the extension to your browser to get started:
Using Unpaywall
When you see the green unlock tab on a webpage, click it to read the full-text of a research article.
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