Proofreading is the final check before words go public: catching typos, grammar slips, formatting errors and inconsistencies that the writer can no longer see. Businesses, authors, students and content teams all need it, and it is a natural side hustle for people who notice errors others miss and enjoy precise, quiet work.

It is also a field where a test matters more than a CV. Clients and platforms judge proofreaders by sample work, not by qualifications, which makes it accessible to beginners willing to practise. Here is how to build the skill and land the first paid job.