There's no such thing as a Master's degree "without a degree." A Master's degree is a postgraduate degree, meaning you must already hold a Bachelor's degree (or equivalent) to be eligible to apply. Universities require a prior undergraduate degree as a prerequisite for admission to any Master's program, including those delivered online.
While many universities offer Master's degrees online, they all require an undergraduate degree as a condition of admission. If you're searching for online Master's programs, you should specify your field of interest and look at the admission requirements of various universities offering those programs.