About QZ Tray
QZ Tray connects web applications with local printers and scanners. It runs as a small background tray application and uses a WebSocket connection to receive device requests from a browser. This enables a web app to send raw print jobs or initiate scanning through printers attached to the user’s computer, including thermal, label, and receipt printers. The software is useful when a browser-based workflow needs direct access to specialized local hardware. QZ Tray bridges the web interface and device, so printing and scanning can happen without moving the work into a separate desktop application. It is intended for businesses building web applications that need to work with local printers or scanners.
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