Unpaywall by Impactstory team

Get free text of research papers as you browse, using Unpaywall's index of ten million legal, open-access articles.

Available on Firefox for Android™

4.4 (243 reviews)

67,321 Users

You’ll need Firefox to use this extension

Download Firefox and get the extension

Download file

About this extension

When you view a paywalled scholarly article, Unpaywall automatically checks its open database of 16 million legal, open-access articles. If there's an open version somewhere, you'll see a green tab on the article. Click the tab and read for free, legally!

Unpaywall is a free, open-source project from Our Research, a nonprofit dedicated to making scholarly research more open, accessible, and reusable.

Rated 4.4 by 243 reviewers

184

Release notes for 3.98

added support for psyarxiv.com

Required permissions: