Free papers

Preprints in physics, maths and computer science

Life science preprints

Medical and clinical preprints

Working papers in social science and law

France's multidisciplinary open archive

A single door to multidisciplinary preprints

A vetted directory of open-access journals

A pioneer of open-access publishing

A multidisciplinary family of open-access journals

An open-access publisher with very broad coverage

Free-to-read articles from Nature journals

The US national academy's interdisciplinary journal

A gateway to free scholarly monographs

An open map of the research literature

Literature search with AI summaries

An academic search engine built in Germany

The largest aggregation of open-access full text

Finds the legal free version of a paper

A full-text database for the life sciences

The standard index for medical literature

A free full-text library in biomedicine

The US education department's research library

A high ground for economics working papers

Europe's open science infrastructure

MIT's papers and theses

Harvard's open-access repository

The widest-reaching academic search

A worldwide directory of institutional repositories

A library of open-access scholarly books

Papers, data and code in one place

The master index of economics literature

A publishing platform for economic policy research

The free portion of JSTOR

The largest Chinese-language literature database

Chinese theses and journals

Chinese science and technology journal search

Open Chinese science and technology reports

The Chinese Academy of Sciences' library services

Open journals from Latin America and Iberia

Japan's academic journal platform

South Korea's official academic citation index

An open library of Russian academic papers

An open journal network in Spanish and Portuguese

A search across borders in open science

A searchable index of theses worldwide

Research summaries from university press offices

A press release platform for research institutions

Coverage of physics and technology papers

Tracking retractions and research misconduct