Kleinanzeigen.com is an online classifieds marketplace presented as a virtual flea market, helping people find, buy, sell, give away, or exchange new and used goods and services. Users can browse listings or post their own advertisements for free, with listings available immediately after submission. The site serves both private individuals and commercial advertisers and promotes local searches across cities throughout Germany.

Its categories cover a broad range of needs, including cars and motor vehicles, property, jobs, services and courses, leisure and personal contacts, clothing, household appliances, vouchers, tickets, food and drinks, rentals, and swapping. Visitors can search by what they are looking for and where, save listings, and access help and safety information. Kleinanzeigen.com describes its marketplace as free to use and without commissions, offering a simple way to connect people with items, opportunities, and services in their area. The platform also provides account registration and login, customer information, payment details, contact options, and a newsletter, alongside its listing and search features.