OATD

OATD, which stands for Open Access Theses and Dissertations, is a search engine specifically designed to help you find graduate-level theses and dissertations that are freely available online. It indexes over 6 million documents from universities and research institutions around the world, covering master's theses and doctoral dissertations across virtually every academic discipline. If you're a graduate student working on your own thesis, OATD can be invaluable for finding related work, understanding how others have structured their research, and identifying gaps in the literature that your own work could address. The search interface is straightforward — you can filter by keyword, author, institution, language, and date range. Each result includes metadata like the degree type, university, and year of completion, along with a direct link to the full text hosted on the institution's repository.