Open access
Open access is a publishing model that makes scholarly research available online for readers without price barriers.
What open access means
Open access makes scholarly research available online without charging readers for access. The idea is especially important for work funded by public money, research needed by doctors and teachers, and scholarship that people outside wealthy institutions may otherwise be unable to read.
The access problem
Traditional scholarly publishing often places articles behind subscription paywalls. University libraries may pay for access, but independent researchers, patients, journalists, teachers, small organizations, and researchers in underfunded institutions can be locked out. Open access responds to that barrier by changing how research is distributed.
Gold, green, and other routes
Gold open access usually means the final article is openly available from the journal or publisher site. Green open access usually means a version is deposited in a repository, such as an institutional archive or subject repository. Preprints, public-access mandates, and diamond open-access journals are other important routes.
Licenses and reuse
Open access is stronger when readers also have clear reuse rights. Creative Commons licenses can allow copying, sharing, translation, text mining, teaching use, or adaptation, depending on the license terms. Some articles are free to read but still have restrictive reuse rules.
Who pays
Open access shifts costs rather than making publishing free. Funding can come from libraries, universities, governments, foundations, societies, consortia, article processing charges, journal subsidies, volunteer labor, or public infrastructure. Each model has tradeoffs for equity, sustainability, and editorial independence.
Quality and peer review
Open access is about access, not whether a journal is rigorous. Many open-access journals use peer review and editorial standards like subscription journals. At the same time, authors still need to watch for deceptive or low-quality publishers that charge fees without providing meaningful review or stewardship.
Relationship to open science
Open access is one part of open science. A paper can be open while its data, code, methods, or peer-review history remain closed. Open science asks a broader question: how much of the research process can be made transparent, reusable, and inclusive while respecting ethics and safety.
Why it matters
Research has more value when people can find, read, teach, test, and build on it. Open access matters because knowledge locked behind paywalls cannot fully serve patients, students, policymakers, inventors, communities, or researchers who lack subscription access.