Handleiding is an online reference service that helps users find product manuals and installation guides. Its searchable library contains more than 849,000 manuals from over 11,000 brands, covering more than 500 categories, including products that are no longer on the market. Visitors can browse categories such as televisions, washing machines, refrigerators, printers, dishwashers, air conditioners, vacuum cleaners, routers, and heating equipment, or search directly for a product.

The service offers more than access to PDF manuals. Users can consult interactive tables of contents, search manuals for error codes and suggested solutions, and ask questions about their products without reading an entire document. The site also features recently answered user questions and troubleshooting information drawn from product manuals, with examples for appliances from brands such as Bosch, Siemens, Whirlpool, and Smeg. Users can request a manual if they cannot find one. Handleiding presents practical information for product setup and problem-solving, while advising users to contact a qualified professional when uncertain about electrical repairs.