Kleinanzeigen. com is an online classifieds marketplace described as a virtual flea market, where individuals and businesses can post free listings and connect with potential buyers or other interested users. The platform supports buying, selling, giving away, and swapping new and second-hand goods, with listings organized across categories such as cars and motor vehicles, real estate, jobs, services and courses, fashion, household appliances, leisure, and a general marketplace.

It also features sections for vouchers, tickets, food and drinks, rentals, and personal ads. Users can search by item and location, browse recent listings, save favorites, or create an advertisement online. The site promotes posting as free and says transactions can take place without commissions.

Kleinanzeigen. com presents its service as available to users in cities across Germany, including Berlin, Hamburg, Munich, Leipzig, and Cologne, helping people find items and services locally. Account registration and login, help resources, safety guidance, and information about payment methods are also available through the website