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QZ Tray is a software utility developed and published by QZ Industries, LLC, designed to enable secure raw printing and scanning directly from a web browser to locally connected hardware. The software addresses a common limitation of browser-based applications, which ordinarily cannot communicate with local devices at the raw level, by acting as a bridge between the web environment and printers attached to the user's machine. According to its description, QZ Tray supports a range of printer types, including thermal printers, label printers, and receipt printers, making it relevant for scenarios where standard browser print dialogs are insufficient and direct device communication is required. The software operates as a small background tray application that runs on the local system. Communication between the browser and the local hardware is handled through a WebSocket connection, which allows web applications to send print and scan requests to the tray application while maintaining a secure workflow. This architecture positions QZ Tray within the category of printing utilities and browser integration tools, particularly those focused on raw printing rather than conventional document printing. Typical use cases for QZ Tray include web applications that need to print receipts at point-of-sale stations, produce shipping or product labels, or output to thermal printers without relying on the operating system's standard print pipeline. Its scanning support similarly allows browser-based software to interact with locally attached scanning devices. Because it functions as a background application, it remains available in the system tray while users work within their browser, ready to process requests as they arrive over the WebSocket connection. The current version of QZ Tray is 2.3.0. The software has two versions recorded in total, indicating that version 2.3.0 is accompanied by one additional version in the catalog. QZ Tray is published by QZ Industries, LLC, and continues to serve as a solution for organizations and developers seeking secure, direct communication between web browsers and local printing and scanning hardware.
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