Valvencoder is a cloud-based media encoding service that allows users to easily encode their images, audio, and video files into various formats and resolutions for different devices. It offers SDKs and a REST API for easy integration and supports most common media formats. Users can choose between a pay-as-you-go cloud version for instant encoding or an on-premise box version for large files or private encoding. Both options provide adaptive bitrate encoding, thumbnail generation, and real-time progress tracking.