It depends on the diploma and the university. A diploma alone does not automatically qualify you for master’s study, but it does not disqualify you either.
Many universities evaluate applications as a package: your diploma, your grades, your work experience, and sometimes test scores or a portfolio. Applicants with a strong diploma and several years of relevant work often have a real shot, especially in professional programs that value experience.
Some schools offer bridge or qualifying programs designed for diploma holders. These usually involve a year of undergraduate-level coursework, after which successful students can enter the master’s program. Ask admissions offices directly whether such a route exists; it is not always advertised.
Credit transfer is another possibility. If your diploma covered material equivalent to undergraduate courses, some universities will grant advanced standing, shortening the degree. Get any transfer decision in writing before enrolling.
Start early and be organized. Gather transcripts, document your work experience, and contact programs individually, since policies differ widely. See master degree or master diploma, minimaster diplomas, and bachelor’s versus master’s.

