extension ExtPose

Lean Library

CRX id


Description from extension meta

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

Image from store Lean Library
Description from store The Lean Library extension is a free tool which assists your library in delivering their services directly into your research workflow in more ways than one! With the Lean Library extension, you can enjoy: ## Lean Library Access ## Do you use Browzine, EndNote Click, Readcube or PaperPanda? Then Lean Library Access is for you! Get easy access to your library’s article and eBook e-resources directly into your browser. The extension will notify when you are on a website that contains material your library can give you access to. A single click will redirect you to this content, no paywalls, no multiple log-ins. The browser extension simplifies searching for relevant sources and facilitates quality study time. A few quick clicks will get you started. ## Lean Library Open - Unlock instant & legal access to millions of free academic papers. ## Did you know that over a third of all academic papers have a free-to-read version available? Our free plug-in unlocks access instantly and legally to millions of these papers, saving you time and effort. Even if you aren’t affiliated to an institution, you can still get quick and seamless redirection to open access materials absolutely free. Simply download the extension and select Lean Library Open as your library. ## Lean Library Futures ## Futures is our ambitious new service bringing additional services from your library into your workflows. We’re still developing this service, but it will be delivered through our Lean Library Extension.

Latest reviews

  • (2022-08-04) Cees Jol: Occasionally uses nearly 100% GPU for lengthy periods. M1 Max, Monterey 12.5
  • (2022-04-17) Daniel Korchinski: The pop-up and redirect are often mistimed or useless. For example, when browsing wikipedia on "Maxwell's equations" I don't need a message saying that "full text alternatives exist" with an option to access a textbook on Clifford algebras. Some redirects or log-ins are useless. For example, I have to disable the extension to access "https://authors.aps.org/" without being kicked into a redirect loop when trying to submit a paper for publication! I don't need a proxy to access the paper submission site. A similar issue (minus the redirect loop) occurs when reading open-access or free access articles: I don't need to be logged in to access these, so the redirect / log-in procedure is just a time waste. Finally, there are times when I arrive at a page I SHOULD have access to, and the extension sits there like a useless lump and does nothing, e.g. go to physical review E, click on the first interesting looking paywalled article, click the "pdf" option, and I'm told I don't have access.
  • (2022-01-20) Sage Blodgett: If it worked it would be amazing... but it doesn't. Don't waste your time nor storage space on this extention
  • (2021-12-22) Gertrude: 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.
  • (2021-12-18) Kevin Zhou: On OSX, randomly causes the whole Chrome window to become a blank screen every hour or so -- impossible to work with it turned on.
  • (2021-11-29) wenhong zhu: I want to use it but I can't find my uni library, Friedrich-Alexander-Universität Erlangen-Nürnberg, please include more libraries, thank you.
  • (2021-11-08) Dienst E-bronnen: 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.
  • (2021-11-08) Natalie Wakefield: The Lean Library browser extension is a brilliantly handy tool providing seamless access to library eResources. As a librarian, I often recommend this extension to library users seeking tips on accessing resources when working off campus. The comprehensive coverage including journals and eBooks is impressive, and we particularly like the signposting to open access alternatives.
  • (2021-11-03) Paul Suijker: 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).
  • (2021-11-03) LIBIS Team: 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.
  • (2021-10-31) Harry Zachariah Rubin: Using Lean Library Open massively simplifies the process of getting access to online resources provided by academic libraries. I particularly love that it unlocks access to paywalled articles!!
  • (2021-10-29) Laura Tobler: Lean Library helps me a lot in finding articles. Today I was referred to a free alternative when I encountered a technical error on the publisher's website. Often Lean Library surprises me with news of an eBook in my library that I didn't know about yet.
  • (2021-10-27) Rory Wood: Really useful for accessing my uni library resources when working from home. Super convenient.
  • (2021-10-27) Tim O'Neill: 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.
  • (2021-10-20) Christina M: 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.
  • (2021-10-06) David de Muinck Keizer: For many papers, its shows the text "Full-Text Achieved You are currently on a Full Text article. Good luck studying!", while the full text isn't shown anywhere. There's no button anywhere on the page or in the plugin to view the full text. The full text certainly isn't displayed anywhere. The original paywall on the page is still in tact. I have seen this at many sites. The amount of times that the plugin actually provides a button to download the pdf is very limited. Please fix this bug. Otherwise this plugin is useless.
  • (2021-10-06) Alex K9onit: Slows down my browser when installed, so eventually uninstalled it. The extension kept taking me to my University page so that I can't browse on the publisher pages that I want to. Kept popping up with suggestions?? that I don't need. Avoid!
  • (2021-09-09) Matthew Smith: As a librarian, I've used LEAN for around 3 years now. During the past eighteen months, it has saved me a huge amount of time while working from home. Granted, I will be spending more time on retrieving articles than most but I am yet to find a downside to this tool - I recommend it to all my students and the feedback is generally great. I work on a relatively high-spec machine but also run with a huge number of tabs / programs open and haven't noticed performance issues mentioned by others. Do sometimes find the pop-ups a bit slow though (i.e. the webpage has loaded but the pop-up takes a few more seconds). Disclaimer: while the above is my honest opinion, it is important to note that I have contact with the developers as LEAN is a product we offer at my university. I believe it to be an incredibly useful tool, but want to flag this relationship in the spirit of transparency.
  • (2021-06-01) Mark Lukacs: breaks all the time
  • (2021-05-24) Robert-Jan Pierik: Doesn't work in maybe 80% of the time
  • (2021-05-12) Neddy: I need the extension for Uni, but it makes chrome extermely laggy and unresponsive. And that is on a high spec computer. I have to uninstall the extension everytime I finished using it, in order to use chrome comfortably.
  • (2021-05-05) Joseph Smith: I find the extension very useful and it makes my research journey much smoother than before. Would recommend it.
  • (2021-05-04) AS Z: While all my other extensions work fine, Library Access doesn't seem to work anymore, either with Firefox or Chrome browsers. When I click on the icon, nothing happens, it's blank. I am no longer logged in through my university log-ins while I visit a site the university has subscribed to. I don't know what to do...
  • (2021-05-04) Dóra Schuller: Very bad user experience. When turned on, this app also wants me to log in to access publicly available articles and Wikipedia pages! Every time I load a page, it takes me away from there to the login, so I have to keep it turned off so I can browse peacefully. Also, in some sites I have to log in 3 times to download an article.
  • (2021-04-22) Dave Gerrard: Should come with a health warning. Breaks links. Pollutes your referencing software. Academics should not use. Clicking the extension gives access but changes the URL in my browser bar. As someone who likes to copy sources by copy and paste, this is a fail. That URL is now useless for anyone outside my institution. Worse, I use a Zotero extension to store and manage references. The modified URLs then get imported into my referencing software. I doubt very much whether they will work in a few years time.
  • (2021-02-11) Yibo Chen: The extension always doesn't work. Each time I wanna use the extension, I need to wait for quite long time before it starts to work. Hope Library Access could improve the extension to be faster and more stable.
  • (2021-02-05) Horvath Daniel: Ez a kiegeszito nagyon segiti a tanulasomat. Javallott!
  • (2021-02-03) Kusal Udawatte: This extension is super helpful!
  • (2021-02-01) Julian Keizer: Slows down Google Chrome (Version 88.0.4324.104 (Official Build) (64-bit)) enormously. Cannot recommend.
  • (2020-12-26) Alexander Alt: Works fairly well most of the time but every now end then, it just uses a lot of CPU even when I'm not actually doing anything in Chrome. This hasn't changed over the last few months (and last few versions of Chrome), it seems to happen when I wake my laptop up after it being in sleep mode but I do that a lot so that might be a coincidence.
  • (2020-11-10) Daniel Blue: Great tool for my studies and research!
  • (2020-10-07) Charles Knight: Something broken in update - tries to take over google search so that it is unable.
  • (2020-09-18) ME Anxiety: Very handy when i'm on websites that are not traditionally supported by my university, but somehow are anyway.
  • (2020-08-15) James C: Useful but uses up 500Mb+ of RAM on "idle". Almost as if this extension is mining crypto or something while it's installed and running.
  • (2020-04-06) Joost de Host: Very useful extension, hence the extra stars, but makes the chrome browser extremely slow, hence only two.
  • (2020-04-03) Juan Andino: Helpful app but you need to either change the default so that the access pop-up doesn't not come up unprompted OR provide users that option. More often than note, this pop-up is super annoying and it would be helpful to just be able to click the icon when you need help with institutional access to an article. Using most up to date version of chrome
  • (2020-04-02) Matthew Harvey: Great premise but causing continuously HUGE CPU usage, making Chrome unbearably slow. Defaulting to whitelisting only known journal sites might help. Developer: try using this on an old or mobile processored computer with more than a few tabs open.
  • (2020-03-29) Sandipan Das: Accessing to uni library resources are good. However, at some point it blocks out your regular internet. Meaning you can't load pages using your browser, at least in chrome. I am using Ubuntu 18.04 with Chrome.
  • (2020-03-23) Míriam R. García: It is a great idea, unfortunately if I activate this extension with Chromium (linux computer), internet stops working on chromium at some point. The solution is either to reinitilize chormium or stop the extension. Quite unfortunately because it took me a long time to find the problem with my internet conection.
  • (2020-03-17) Kate: Works remarkably well! I always get instant access to my university hospital's library via this extension. Works as intended.
  • (2020-02-05) Rahul Jajodia: We have access to a lot of journals from our university using eduroam. Been using this to access papers from home recently and its a very easy process. Makes life easier. Will hold on a better review until i use it more
  • (2020-01-28) Ben Bartlett: I hate that I am forced to use this extension for remote library access. It intermittently slows my internet speeds to unusable levels (with sites that should not go through a proxy, such as Twitter, taking over 60 seconds to load) and increases CPU and memory impact of Chrome significantly.
  • (2020-01-09) Andrey Fedorov: It's a very strange extension. First, there is no way to selectively use it for specific pages. It often applies itself to pages when not needed, messing up the functionality of those pages. Then I need to go to Extensions settings to manually disable it altogether. Second, it does not work reliably. There are pages where it activates, I see the icon is green, but the content is still not available, or magazine web site still shows "sign in" and "subscribe" links. I am on the verge to remove it completely, but keeping just in case as a last resort.
  • (2019-11-20) Roger Bosman: At the minimum it needs a blacklist for websites, the popup is showing even on pages like Wikipedia. However, a way better option would be to be able to disable the popup, and show the extension as "access available" in another color when the popup would normally show. The website actually describes this feature, but says the institution has control over this? Why? Just let me supress the popups please!
  • (2019-11-13) Nice product that paves the way for easy off campus access, adding to the Open Access and Open Science standards outlined for the future of science and education. The tool connects directly with your library's collection, so you have constant access same as you have on-campus. The tool further prevents students and researchers from paying for content that the Library has in its collection either at the same publisher or even somewhere else.
  • (2019-11-08) René Oostdijk: Bijzonder handige browser-extensie. Stuurt je automatisch naar de full-text versie van een artikel of biedt je de mogelijkheid om het aan te vragen via de bibliotheek van je hogeschool of universiteit.
  • (2019-09-07) Mark Murray: Needs a "ignore this site" feature. I have my own subscription to WSJ and this addon prevents me from logging in.
  • (2019-07-12) Yoram Bossenbroek: Great application. I can now easily access papers without establish a VPN or remote desktop connection with my University. Two times I had an error at a certain site, but the responding time of the support teams from lean library and the TU Delft (my University) is very fast (within two hours) and both times they could fix the problem directly.
  • (2019-01-20) Grant Hayes: Convenient when you need it but a huge pain when you don't. This extension makes accessing academic papers etc. easy, but if there if you have your own subscription to said material, this extension will almost always override your account causing HUGE headaches. E.g. I have a personal subscription to The Economist I cannot access without uninstalling this silly extension.
  • (2018-08-07) Hayley B.: Unfortunately having the extension active used 70% of my CPU, making my fan shriek, my laptop overheat, and eventually chrome would stop responding. Disabled the extension and voila-- fan stopped and chrome went back to normal. Unfortunate because its a good idea for an extension and its a very useful too when it works (especially as a thesis-writing master's student). Too bad it uses all your CPU.

Latest issues

  • (2022-04-26, v:2022.4.1) Anton Reznik: Browsers support
    Hi, What browsers Lean Library app support? Chrome, Firefox, Safari, Edge,...? Thank you, Anton
  • (2022-04-17, v:2022.4.1) Jeremiah Mianxin Sebestien Liemaar-LIM I: LAW ENFORCEMENT REQUESTT OF 47 UUSC INVOLVING CLASSIFIED CASES OF MILPERSMAN
  • (2022-02-22, v:2022.1.4) Irene van den Broek: No download button for chrome
    As others note, there's no download button. How can I download lean library in chrome? Is it possible to display a screen shot to solve this problem...?
  • (2022-02-05, v:2022.1.4) Pierre Divenyi: lean library dowloaded, now how to use it???
    After downloading Lean, I see nothing where I could do a simple library search. My extensions show Lean library and Loopio. No instructions about what to do with them. When I used to go to my university's library site in the past (Stanford), I could open a window and search for articles I wanted to see within the category of my choice. How am I allowed to do such a thing with Lean? Opening the Lean extension offers no search window.
  • (2021-11-18, v:2021.11.3) ihuoma chikezie: How to downoad.
    I don't know how to continue after getting to the chrome web store.
  • (2021-10-25, v:2021.10.5) Willem Pijnenburg: Download button
    Where is the download button?
  • (2021-10-09, v:2021.10.5) Lance Ang: Cannot download
    Where is the download button?
  • (2021-09-27, v:2021.9.3) Judyta Szacillo: No download button
    As some users reported earlier, there is no download button. When will it be fixed?
  • (2021-09-27, v:2021.9.3) 薇薇安: No download button
    No download button
  • (2021-09-25, v:2021.9.3) Ian Steyn: No download button
    There is no download button. The page offers a panel with an x near the bottom... if I click that it asks if I want to remove the extension from my chrome apps, but I never have the extension in the first place. If i click the x that panel does not go away and i still can't download it.
  • (2021-09-25, v:2021.9.3) Vendela Malmström: No download button
    Hello! Sadly I am unable to download the extension. Can't find a button for it. It also says that it's already added to my extensions. A bug maybe?
  • (2021-09-25, v:2021.9.3) Leticia Vianna: Download
    Unable to download
  • (2021-09-25, v:2021.9.3) Marije Ekelenkamp: No download button
    Hi, I am unable to download this extension. I scrolled down and my laptop assumes I've already installed the extension. However, I tried managing my extensions in Chrome and Lean Library is nowhere to be found. Kind regards, Marije
  • (2021-09-23, v:2021.9.2) Joep Maas: Download button
    Hi, the download button on this webpage seems missing, how do I download the extension?
  • (2021-09-17, v:2021.9.2) Sanjay Chaudhari: Set Default Values
    Hello Team We are setting up enterprise level Lean Library extension to Google Chrome extension. During this we want to pass default value to "Select Your Library" as my orgnization's purchased library. We are using Google Admin Console to for deployment of this extension. Please suggest
  • (2021-06-21, v:2021.6.3) Zenobia van Dongen: The blurb for Lean library is misleading
    The blurb for Lean library claims you don't have to be affiliated to any library to access papers. However I was supposed to select "my" library from a list only about 40 worldwide. None of them are in my country Argentina. i was unable to proceed.
  • (2020-12-11, v:2020.13.1) Milan Milenovic: Serious bug with Google scholar
    Hello, I would like to report a bug: When I have this extension enabled and I visit google scholar and search for anything, the results page keeps indefinitely refreshing over and over and makes it impossible to use google scholar at all. even if you manage to clink on some result, page will always refresh back to google scholar. I am using Chrome Version 77.0.3865.90 (Official Build) (64-bit) on Windows 10.
  • (2020-10-18, v:2020.11.2) Simon Moulds: Cannot access nature.com
    When I try to access nature.com with the Library Access extension I get a "Bad Message 431 reason: Request Header Fields Too Large" URL: https://idp-nature-com.salford.idm.oclc.org/authorize?response_type=cookie&client_id=grover&redirect_uri=https%3A%2F%2Fwww.nature.com%2Fnature
  • (2020-10-05, v:2020.11.1) Sjaan Oomen: Extension doesn't work
    Hi, the extension only shows the text "The extension will only be active when you are on an academic site. If you have any questions, contact our library." instead of the usual access granted by my institution (Radboud University) for all academic sites including PubMed and WoS. Is there something I can do or was the last update faulty? Thank you. Cheers, Jeanne
  • (2020-09-10, v:2020.10.7) Sakeenah Daniels: ClassLink SAML Signing Cert Update
    Dear Vendor Partner, Our records show that a SAML single sign-on connector exists between your platform and at least one shared customer. ClassLink’s default SAML Signing Certificate will be updated on Saturday, September 19, 2020, at 1 am Eastern. WE DO NOT KNOW if the SAML single sign-on connector with your organization will automatically accept our new SAML certificate. Additional action on your part may be required. Does your SAML implementation automatically refresh metadata? If it does not, it is probable that SAML single sign-ons to your products will not work after our new certificate is effective on Saturday, September 19, 2020. Metadata may need to be refreshed. Below are two options to resolve metadata refreshing. • Enable automatic refresh of ClassLink metadata. Here’s a link to accomplish this using Simple SAML. • Manually refresh ClassLink metadata. You should perform a manual refresh after our certificate update is complete. Our new certificate will be effective on Saturday, September 19, 2020, at 1 am Eastern. Given that SSL Certifications are now capped at one year, SAML SSO’s may have potential issues annually. We recommend vendor partners consider moving to OAuth 2.0 based SSO connectors which are equally secure, require much less maintenance, and provide other benefits. Please contact us if you have questions at [email protected] with the subject “SAML Cert Update”. Here is a link to our advisory communication to customers. We wish you the best during this very unusual back-to-school season. Sakeenah Daniels, MPA [email protected],com Vendor Relationship Associate Classlink
  • (2020-09-04, v:2020.10.6) Thomas Aarholt: "eBook alternative" keeps notification popping up on unrelated pages
    The notification that there exists an "ebook alternative" to a pdf I have previously read keeps popping up on unrelated websites. For instance, in the jupyter notebook environment. It's a little odd, and it would be nice to fix this behaviour. Happens on both Chrome and Firefox. Here is a screenshot: https://imgur.com/a/HteoYMz
  • (2020-06-24, v:2020.7.2) Dealraider Sales: Backup of Configuration and Library Settings?
    Is there a way to backup and restore the set of libraries in our extension? I have many library systems to which I belong and it took a while to load them all into the extension. It would be nice to backup this work and reload it if necessary or on other systems.
  • (2020-05-28, v:2020.7.2) AUDREY ZHENG: I cannot search Monash University when I register
    It's really sad for me when I try to use this extesion but I cannot register it since my uni isn't on the list QAQ
  • (2020-05-09, v:2020.6.3) T: Shortcut key shift+option+l (on mac)
    How can I change this combination? It is actually reserved for a specific letter from Polish alphabet and the extension overwrite the default keyboard shortcut.
  • (2020-04-07, v:2020.4.1) Fabio De Ferrari: The extension prevents logging in Mendeley webapp for Chrome
    If I enable the extension, then Mendeley Web importer does not work. When I disable it, it works. Mendeley returns a server issue saying I can't login. I assume the proxy handles connections in a way that doe not allow to mendeley to authenticate my account with the server. Can you please look into that?
  • (2020-02-19, v:2020.3.1) Gunnar Lund: Chrome hangs
    Since last update, chrome's network connection will hang after ~1h of the window being open. Restarting chrome resolves this problem. Disabling this extension fixes this.
  • (2019-12-21, v:2019.110.6) Jon Chuang: Recent Slowdowns Caused By Extension
    I have been experiencing massive page load slowdowns caused by this extension, especially when restoring many closed windows. Please look into this issue. A solution I found effective is to disable the extension when reloading many pages and then reenabling it, but it would be nice if it did not cause problems in the first place.
  • (2019-04-09, v:2.15.0) Noémie mv: Access problem
    I used this extension for a year and a half without any problem. Since yesterday when I want to access a document either from google scholar or from the EUR library website it asks me to log in, not with the EUR erna but with the Hogeschool Rotterdam. I do not undderstand because the library listed in my google scholar parameter is the EUR. I also am on campus AND connected on SSO on canvas while doing my research. What is blocking my access ?
  • (2019-04-09, v:2.15.0) Noémie mv: Login details from another university
    I used this extension for a year and a half without any problem. Since yesterday when I want to access a document either from google scholar or from the EUR library website it asks me to log in, not with the EUR erna but with the Hogeschool Rotterdam. I do not undderstand because the library listed in my google scholar parameter is the EUR. I also am on campus AND connected on SSO on canvas while doing my research. What is blocking my access ?
  • (2019-04-08, v:2.15.0) Sam Mears: Firefox extension?
    I use Mozilla Firefox, and not Google Chrome. I can't find a Library Access extension on addons.mozilla.org - is there one available?
  • (2018-11-18, v:2.11.3) noor ul ain: problem in access to uea account
    i got access to lean library but didnt get uea account access?
  • (2018-10-16, v:2.10.2) Vivek Tandon: Devices
    Can I access this across all my devices - do I have to log on via uni password on each one or just one time? Thanks
  • (2018-09-14, v:2.9.1) Yasser Aboura: selecting library
    I am having issues with selecting library in the main drop down menu. If I add an extra institution it will allow me to select a library, but obviously the add-on wont work until a library is selected in the main (asterisk) menu. How do I sort this issue?
  • (2018-02-09, v:2.1.18) Internet issues
    When I have this extension enabled, I have very slow/no internet connection eventhough I am connected to a Wi-Fi connection. When I disable the extension I don't have this problem. It is not a Wi-Fi problem I guess. I have this problem on multiple laptops. I am from the VU university.
  • (2017-12-29, v:2.0.4) Pierre Moquet: Desactivation by Chrome
    This extension has been desactivated by Chrome on my laptop. How to solve the issue? Kind regards Pierre
  • (2017-12-27, v:2.0.4) vaskar saha: extension popup
    Is too big and stays on the top screen, hiding the page underneath and the links in the publication
  • (2017-12-12, v:2.0.2) Still issues
    Uninstalled the extension, closed my browser, reinstalled the extension. Still the same issue. We did receive a message from Jan that a fix was deployed around 11 AM?


100,000 history
3.2 (66 votes)
Last update / version
2022-05-12 / 2022.5.4
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