The responsibilities of a freelance editor involve working to write or source copy for a client. Your duties in this career usually include ensuring that the spelling, punctuation, and grammar are correct, and that the text meets the style guidelines and quality standards of the client. Depending on the type of work, you may add images or other content and publish the work on a website. As a freelance editor, you may need to publish samples or a portfolio of past work to attract clients. Freelance editors usually work with multiple clients at the same time.