**Spreadshirt.dk** is a Danish online platform that allows users to create and customize their own apparel and accessories, such as T-shirts, hoodies, mugs, and bags. The site offers a variety of design templates and customization tools, enabling individuals, teams, and businesses to personalize products with unique designs, logos, or text. Spreadshirt.dk also provides options for selling custom designs through its marketplace, making it a popular destination for personalized gifts and merchandise.