You can start an online business with no money if you choose the right way. Start by looking into low cost options like dropshipping or print on demand where you don’t have to buy inventory upfront. You can also sell digital products like ebooks or online courses where you don’t need physical stock. Use free website builders or ecommerce platforms with trial periods to set up your store. Promote your business through social media and content creation and reach customers without spending on ads. Validate your idea and improve your offerings as you go.