ZFO Soubor

ZFO Soubor is a web-based tool that allows users to open and view ZFO files (Czech electronic data mailbox containers) directly in their browser without requiring any software installation. The service provides free preview of file metadata and signature information, with paid access to full document contents.

Key features include drag-and-drop file upload, extraction of individual documents to readable PDF format, bulk download of attachments as ZIP archives, and signature verification. The application works on both desktop and mobile devices, with files remaining on the user's device for privacy and security.

The product is designed for Czech citizens and businesses who need to access and manage documents from the national data mailbox system (Datová schránka), providing an accessible alternative to specialized desktop software like 602XML Filler.