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Read research papers for free.

Click the green tab and skip the paywall on millions of peer-reviewed journal articles. It's fast, free, and legal.

The Unpaywall extension requires Chrome or Firefox.

600,000+ users on Chrome and Firefox.

Access millions of research articles, instantly.

Unpaywall users read 52% of research papers for free. Here's how: when you browse to a paywalled paper, we check to see if there's a free copy in our database. If there is, you'll see a green tab on your screen...just click, and read!

Legal, fair, and sustainable.

We harvest our content from thousands of university and government web servers all over the world. The fulltext articles we find there have been legally uploaded by authors, with permission from publishers.

What people say about Unpaywall.

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Tom Mueller
Author
Yesterday I found Unpaywall, and my life changed. I've already gotten four publications by clicking on the Mystical Green Padlock...Thank you, from the heart.
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Stacy Konkiel
Dir. of Research & Education
Unpaywall makes it really easy to (legally!) find free versions of journal articles.
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Rupesh Paudyal
Science Writer
HIGHLY RECOMMENDED ... instantly unlocks articles behind paywalls. A must for all researchers.

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UnsubChrome/Firefox extensionDatabase snapshotData FeedREST APISimple Query ToolLibrary link resolver integrationSearch articles

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