Unpaywall: Easily bypass the knowledge pay wall and get academic papers for free

What is Unpaywall Unpaywall is an open source and free browser plug-in that helps users easily bypass the knowledge pay wall and obtain academic papers for free. It was developed by the nonprofit organization OurResearch (formerly known as ImpactStory). It integrates open access (OA) content from more than 50,000 publishers and literature libraries around the world, has a database of 49.28 million articles, and has approximately 600,000 to 800,000 active users on Chrome and Firefox.     When browsing paywall papers, the plug-in automatically retrieves their database. If a legal free version is found, a green unlock label will be displayed on the side of the page, and click to access the full text for free.       Data and influence Unpaywall users can read approximately 52% of their research papers for free and process an average of 10 articles per second. Database support sources include: universities, government agency web servers, PubMed Central, DOAJ, Crossref, DataCite, etc. The plug-in is committed to "green open access": the official version or final draft content that the author spontaneously uploads after obtaining publishing permission. Legality and privacy All sources are legal uploads and do not contain content from gray channels such as SciHub. Users 'personal data is not collected and is not used for user portraits or other purposes. experience Easy to operate: It automatically takes effect when browsing the article page, without the need to manually enter DOI. The green icon prompts are intuitive and easy to use. A wide user base: students, researchers, and librarians have reported that it is a "must-have tool", greatly improving the efficiency of document acquisition. High degree of integration of plug-ins: they are included in a large number of library systems and academic platforms, such as Web of Science, Scopus, Europe PMC, etc. Technology and sustainability The database can be used through public APIs or regular downloads to support automatic updates and analysis. Non-profit model: Maintain operations through Data Feed subscriptions without relying on subsidy funds. No infringement risk: No piracy is involved, and legal green OA content is displayed to users. How to use Unpaywall Unpaywall provides scientific researchers with an efficient and convenient "knowledge portal" on the premise of legal compliance. Its extensive database integration capabilities and excellent user experience make document access in scientific research, learning, library services and other fields smoother. It is recommended that you install this plug-in when browsing academic articles every day to completely bid farewell to the paywall barrier.   Official website address: unpaywall.org/