This browser extension automatically detects if a legal, free version of an article exists elsewhere (like an institutional repository) when you visit a paywalled page.
You can paste a DOI into the Open Access Button website to search for legal copies or request one directly from the author. how to download papers using doi
Many university libraries offer tools like LibKey.io or a "Citation Linker" where you can input a DOI to see if your institution provides full-text access. 2. Legal Open-Access Tools This browser extension automatically detects if a legal,
Database, Journal, & Article Searching: Search by DOI or PMID how to download papers using doi
If the paper is behind a paywall, several legal tools can help you find a free, authorized version: