MJ Leilões is an online auction platform offering listings across a broad range of asset categories. Its catalog includes light and heavy vehicles, residential, commercial and rural properties, farms, machinery, equipment, furniture, computer equipment and other goods. The site features current, judicial and extrajudicial auctions, as well as records of completed and suspended sales, with event details such as auction format, opening bids where available, and opening and closing dates.

Many of the featured listings involve public-sector assets declared surplus, including vehicles, machines, office items and other equipment offered by municipal governments. Property auctions are also represented, including residential and commercial real estate and rural land. Visitors can browse featured and popular auctions or use advanced search to find listings. The platform provides account registration and login, auctioneer information, frequently asked questions, help and contact channels. MJ Leilões also offers email updates and publishes its privacy policy and information about its technology. The company lists an address in Sumaré, São Paulo, along with telephone, WhatsApp and email contact options.