Unpaywall

by extension · unpaywall.org · Workflow & Planning

FeaturedEstablished publisherManifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

Legally get full text of scholarly articles as you browse.

Users

+100K in 30 days

Rating

3.7 / 5

−0.25 in 30 days

Ratings

284

+2 in 30 days

Store rank

#354

#332 among extensions

Version

3.99

updated 8 Jan 2025

Users

monthly, 3 years

Latest, 15 Oct 2026: 1,000,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years

Latest, 15 Oct 2026: 284 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Unpaywall

Get full text of scholarly articles as you browse. When you view a research article, Unpaywall automatically looks for a copy in our index of 20 million free, legal fulltext PDFs. If we find one, click the green tab to read the article. Unpaywall points you to legal, author-posted manuscripts that are hosted on university and government web servers. We are pointing to versions that have been posted with the full and explicit authorization of the publishers themselves. These free, author-posted manuscripts are often called "Green Open Access" and are a longstanding and completely legal part of the scholarly communications ecosystem. The majority of scholarly journals permit authors to "self-archive" their papers on university and government web servers. It's these legally self-archived papers that Unpaywall helps users find. Any papers posted outside of publisher permissions are NOT included in our index.