QZ Tray

QZ Tray connects web clients with local printers and attached devices for printing and device communication. Its JavaScript connector enables these functions from JavaScript. Browser printing supports PDF, PNG, HTML, PCL, ESC/POS, EPL, ZPL, SBPL, and FGL formats; hardware communication works over serial, HID, USB, socket, and file I/O. Listed compatible printer brands include Zebra, SATO, Epson, Citizen, Star, Boca, and Dymo. The desktop software is available for Windows, macOS, and Linux, including Intel and ARM or Apple Silicon systems; supported platforms also include iOS, Android, and ChromeOS. QZ Tray can be downloaded and used for free with warnings, and the maker offers a free demonstration with warnings. Removing print-dialogue warnings and enabling silent printing requires message signing with a certificate and private key. QZ says signing keys are generated in the customer’s browser and it never receives a copy of the private key. Only one instance can run at a time on a machine because QZ Tray uses a localhost WebSocket connection to a single port. QZ Industries, LLC was founded in 2013 and is based in Canastota, New York.

QZ Tray bridges browser clients with local printers and devices, with broad listed format and connection support. Free use comes with warnings, while silent printing requires message signing and only one instance can run on a machine.

QZ Tray suits developers connecting browser-based workflows to local printers or attached hardware. It may be relevant where JavaScript printing, device communication, or support for listed printer brands is needed.

QZ Tray is desktop software that lets browser clients print to local printers and communicate with attached devices. It is best for teams building web workflows around nearby hardware. Its broad format and connection support is useful, but silent printing requires signed messages and each machine can run only one instance.

Overview

QZ Tray focuses on the connection between a web application and hardware attached to a computer. That makes it a fit for developers who need browser-based software to trigger printing or device communication, rather than for organizations seeking a broad print-management suite.

Free use lowers the barrier to evaluating or deploying that bridge, though print-dialogue warnings remain unless messages are signed. The single-instance limit also matters in environments that expect multiple copies of the service on one machine.

Key features

Browser clients can print PDF, PNG, HTML, PCL, ESC/POS, EPL, ZPL, SBPL and FGL. This mix spans common document formats and printer-oriented formats used in specialized workflows. Compatible brands include Zebra, SATO, Epson, Citizen, Star, Boca and Dymo, giving teams a range of established printer options.

QZ Tray also communicates with devices over serial, HID, USB, socket and file I/O. Its JavaScript connector exposes printing and device communication to JavaScript applications, making it useful when a web workflow needs to reach local equipment as well as produce paper output.

Free printing and demonstrations include warnings. To remove print-dialogue warnings and enable silent printing, messages must be signed with a certificate and private key. QZ says the keys are generated in the customer's browser and that it never receives a copy of the private key. This gives teams a way to keep the key on their side, while making signing a necessary setup step for unattended printing.

Only one QZ Tray instance can run on a machine because the software uses a localhost WebSocket connection on a single port. That is a concrete deployment constraint for setups that need separate instances on the same computer.

Pricing

QZ Tray uses a freemium model. The free plan supports downloads, use and demonstrations with warnings, making it suitable for evaluation and workflows that can tolerate those prompts. A free trial is also available.

Sponsored Support costs nothing with annual renewal at a reduced rate and requires special qualifications. It includes a one-year trusted key pair, critical bug-fix support, 48-hour email support, software updates and phone support by appointment. It is the no-cost route to those services for organizations that meet the qualifications.

Premium Support costs $749 a year, billed with annual renewal at a reduced rate. It includes a one-year trusted key pair, critical bug-fix support, 48-hour developer email support, software updates and phone support by appointment. This is the paid option for teams that need a trusted key and a defined support response.

Company Branded + Premium Support costs $3,499 a year, billed with annual renewal at a reduced rate. It adds a custom build portal alongside a trusted key pair, critical bug-fix support, 48-hour email support, software updates and phone support by appointment. It suits organizations that need a branded build as well as support; teams that only need the core bridge can use the free plan or choose Premium Support without the custom portal.

Platforms

Desktop software is available for Windows, macOS and Linux, with support for Intel and ARM or Apple Silicon systems. Supported platforms also include iOS, Android, ChromeOS, web and API, and mobile printing is supported. The on-premises deployment model suits workflows centered on local devices.

Who it's for

QZ Tray is strongest for developers and organizations connecting browser-based applications to local printers or attached hardware, especially when they need several print formats or communication interfaces. It is less suitable where multiple instances must run on one machine, or where silent printing without signing setup is a requirement.

Pros and cons

• Broad print-format support: PDF, image, markup and printer-specific formats give web workflows flexibility across output types.
• Device communication beyond printing: Serial, HID, USB, socket and file I/O support makes the bridge useful for attached equipment as well as printers.
• Free use with a clear constraint: Teams can use and demonstrate the software without charge, but warnings remain unless messages are signed.
• Single instance per machine: The one-port localhost connection prevents running multiple QZ Tray instances on the same computer.
• Support plans add a trusted key: Paid plans bundle signing credentials and support, but the $$749 annual Premium Support price may be more than a team needs if it only wants basic local printing.

Alternatives

ezeep is worth considering for teams that want a freemium print service with a free plan covering up to 10 users, one connector, unlimited user print jobs and 50 API pages per month per organization.

LRS VPSX is a paid alternative for readers comparing print software across desktop, mobile, web and self-hosted platforms.

MyQ X may suit organizations seeking enterprise print-management features, embedded terminals, integrations, and scan and copy workflows.

Synappx Cloud Print is another paid option, with a pay-as-you-go subscription and quote-based pricing.

KYOCERA Net Manager is a paid alternative for readers looking for a product from Kyocera.

Pharos Uniprint is an on-premises print-management option aimed at colleges and universities.

PrinterLogic is a paid alternative priced by print-queue volume, with the 50–99 queue plan at $109.60 a month and the 25–49 queue plan at $121.80 a month.

Xerox Workplace Suite is a paid, modularly licensed alternative from Xerox.

For a wider comparison, browse Print Management Software.

Verdict

Choose QZ Tray when a browser application needs a capable local bridge to printers or attached devices, and the format and interface breadth outweigh the single-instance limit. Free use is a practical starting point; teams that need warning-free silent printing must plan for message signing, while those needing a trusted key and support can step up to Premium Support. Look elsewhere if the priority is broad print management or running multiple instances on one machine.