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Lean Library

A library-approved tool to unlock access to academic papers.

Users200KCurrent public install base
Rating3.4Store average score
Reviews142Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
Preview

Lean Library Media preview

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Trend

User growth trend

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User Growth Over Time

200K200K200K200K200K2026年7月15日2026年7月18日2026年7月21日Latest: 200K
Rating trend

7-day rating trend

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7-day rating change

Start
3.43
Latest
3.43
7-day rating change
0.00
3.333.383.433.483.532026年7月15日2026年7月18日2026年7月21日Latest: 3.43
2026年7月15日2026年7月21日
Growth overview

Daily, weekly, and monthly growth

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1-day growthFlat
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7-day growthFlat
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Technical snapshot

Version, languages, and crawl freshness

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Version2026.5.0
ManifestV3
Size11.91MiB
Languages1English
Published
Store updated
Last crawled
English
Overview

Product summary

Review the store description, core capabilities, and common use cases.

Providing an uninterrupted research rhythm

Lean Library is a free end-to-end research tool that brings your library’s services and resources directly into your research workflow, no matter where you start your research. Whether you are discovering and accessing academic content or saving references, Lean Library puts your library right at the heart of every research journey. Instantly and legally unlock millions of academic articles, eBooks, and open access content, avoid paywalls, and receive customised guidance from your library. Save references, highlight and annotate content, get journal alerts, and build information literacy skills with article retraction alerts and trust ratings—all from within your browser.

Ready to start using Lean Library?

Install the extension, select your institution and begin researching! Even if you aren’t

affiliated with an institution, you can still get quick and seamless redirection to open access materials absolutely free by downloading the extension and selecting Lean Library Open as your library.

Please note, the Lean Library browser extension works together with Lean Library

Reviews

Recent review snapshot

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Store average score3.4Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average3.1Average computed only from synced review bodies below
Reviews with text103Synced review bodies
Total ratings / reviews142Chrome Web Store public rating/review count

Store average score: 3.4. 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.

5
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19
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29
Sage Blodgett2022年1月20日
1

If it worked it would be amazing... but it doesn't. Don't waste your time nor storage space on this extention

Language en
1 helpful · 0 not helpful
Gertrude2021年12月22日
5

The library I work for is in the process of setting this up. It's looking good so far, and I think it will be very useful for students who are not on campus, helping them get access to library resources.

Language en
3 helpful · 0 not helpful
Kevin Zhou2021年12月18日
1

On OSX, randomly causes the whole Chrome window to become a blank screen every hour or so -- impossible to work with it turned on.

Language en
1 helpful · 0 not helpful
Olivia zhu (Olivia)2021年11月29日
1

I want to use it but I can't find my uni library, Friedrich-Alexander-Universität Erlangen-Nürnberg, please include more libraries, thank you.

Language en
1 helpful · 0 not helpful
Dienst E-bronnen2021年11月8日
5

A great deal of our patrons do not always use our library discovery system (~ catalogue). The LL extension comes in very handy when they are browsing/Googleing through online publisher content. It offers them seamless proxied access to content they are entitled to via our institution, we can easily provide them with information in Assist messages, and it refers them as much as possible to our discovery system as a reference for precisely knowing our licensed publisher content. Contrary to other reviews, we are not experiencing any timelag due to the extension in our browsers, nor did we get patron complaints concerning this.

Language en
1 helpful · 0 not helpful
Paul Suijker2021年11月3日
5

A quick note from a librarian. Here at TU Delft, the use of the Lean Library extension has gradually increased from 4,400 to 7,600 unique users per month in the past year, making it one of the most popular extensions. Its use is not entirely undisputed, but in my opinion the advantages (easy off-campus access to online resources) greatly outweigh the disadvantages (speed, html changes).

Language en
2 helpful · 0 not helpful
LIBIS Team2021年11月3日
5

Lean Library is a handy browser extension to get access to the e-resources licensed by your institution, on every website and from every location. When Lean Library is installed, the extension detects whether you have access to the the content you encounter or not and simplifies the process of getting access to e-resources off-campus. A pop-pup hands you all necessary information where needed. For KU Leuven users, more information on this tool is available at: https://bib.kuleuven.be/english/collections-access-borrowing/access-to-e-resources/lean-library/leanlibrary.

Language en
2 helpful · 0 not helpful
Rory Wood2021年10月27日
5

Really useful for accessing my uni library resources when working from home. Super convenient.

Language en
3 helpful · 0 not helpful
Tim O'Neill2021年10月27日
5

Massively simplifies the process of getting access to electronic resources provided by my academic library. I particularly love the ability to unlock open access alternatives when you hit paywalls too.

Language en
3 helpful · 0 not helpful
Christina M2021年10月20日
2

Very useful for research and finding resources but slowed down my keyboard response on Google Chrome and made using Google Docs and other websites very laggy. Got so frustrating I unfortunately had to disable the extension. Very disappointing. If this issue were to be fixed, I'd redownload it.

Language en
2 helpful · 0 not helpful