Many foreigners freelance in fields such as journalism, teaching and IT. But the usual catch applies: you need a valid work visa. There is no specific freelance work visa so many people freelance as a sideline to a regular job that provides the visa and a stable income. Another popular route is to get a regular job first, then quit and go freelance. You won’t lose your work visa if you leave the company that first sponsored it; though you may need to show the immigration authorities that you have a source of income to support yourself so try to have some freelance contracts lined up.