Legally get full text of scholarly articles as you browse.

What is Unpaywall?
'Unpaywall' is a handy research tool that helps users freely access full-text PDFs of scholarly articles. It scours the web for author-posted manuscripts legally hosted on university and government servers, often termed as 'Green Open Access'. Unpaywall strictly adheres to publisher permissions and excludes papers posted outside of these permissions from its index.
Users: 700,000+
Version: 3.98 (Last updated: 2021-07-30)
Creation date: 2020-02-28
Risk impact: Low risk impact
Risk likelihood: Very low risk likelihood
Manifest version: 2
  • *://*.oadoi.org/*
  • storage
Size: 683.01K
URLs: Website
Stats date:

Other platforms

Unpaywall (v3.98)
4.37 (222) 61,021+
Not available on Edge
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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.

User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
  • Saves time searching for legal, open-access versions of manuscripts
  • Useful for accessing scientific journals
  • Works well on some articles
  • Does not work on some mainstream media sites like Wall Street Journal, New York Times, Washington Post
  • Fails to detect available full versions of articles in some cases
  • Inconsistent in finding free versions of research papers/journals
Most mentioned
  • Doesn't work
  • Only works on scientific journals
  • Useful but sometimes fails to detect full versions of articles
  • Saves time searching for free versions of articles
Recent reviews
by hendrik vanvelk hendrik vanvelk, 2024-04-13

by Prakshab Adhikari Prakshab Adhikari, 2024-04-11

Simple, to-the-point, and gets the job done. It will NOT help you break past a paywall; rather, it will save you time searching for a legal, open-access version of the manuscript.
by Soura Bhattacharyya Soura Bhattacharyya, 2024-04-09
View all user reviews
Risk impact

Unpaywall is relatively safe to use as it requires very minimum permissions.

Risk likelihood

Unpaywall has earned a good reputation and can be trusted.

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