Open Access Helper Web
Education
Helps you find Open Access copies of paywalled scientific articles, by utilizing Unpaywall and other services
Users
7K
Rating
5.0
Reviews
2
7D Growth
+1K|16.7%
Stable signalNo paid features detectedMedium-risk permissions
Unpaywall
Legally get full text of scholarly articles as you browse.
Users900KCurrent public install base
Rating4.0Store average score
Reviews280Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
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2 assetsUnpaywall Media preview
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Start
3.98
Latest
3.98
7-day rating change
0.00
2026年7月13日2026年7月19日
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Version3.99
ManifestV3
Size670KiB
Languages1English
Published
Store updated
Last crawled
English
Overview
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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.
Reviews
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Store average score4.0Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average3.4Average computed only from synced review bodies below
Reviews with text139Synced review bodies
Total ratings / reviews280Chrome Web Store public rating/review count
Store average score: 4.0. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
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When you need to find the original research, this is the perfect extension. I use this on all my personal computers. Unpaywall is an absolute must have extension!
Works like a charm!
Works really well. Of course, it doesn't always find a free version of the article but it often does Very helpful!
It doesn't work; it doesn't show at all.
Didn't work for me.
It generally works nicely and is very convenient! However, Google Scholar can often find papers not found by this extension.
Doesn't check for all free papers Often Google Scholar + ResearchGate yields better results for free legal papers.
Incredibly simple. Vastly better than the alternative. I've saved hours in avoiding manual searches in the few months I've had this.
Science needs to get more centralized.
Works suprisingly often. Free research to free your mind!