QZ Tray is open-source (LGPL v2.1). Downloading it from the official GitHub repository is 100% legal, safe, and free. Be wary of any site asking for payment for “QZ Tray 19 8 top download” – that is a scam.
All communication between the browser and the tray is local (ws://localhost:8150 or wss://localhost:8150 if you enable TLS). No data is transmitted to external servers unless your application explicitly does so.
QZ Tray 19.8 arrived as a quietly essential tool for reliable browser-to-printer connections. Lightweight and focused, it bridges web apps and local printers without clumsy driver installs or platform lock-in. Release 19.8 tightened security, simplified pairing, and improved raw-print stability across receipt printers and label devices — the exact fixes developers building POS and kiosk systems needed.
Why it mattered:
Practical takeaway: For businesses running web-based POS, kiosks, or inventory stations, updating to 19.8 reduced downtime and printing errors with minimal developer effort — a minor release that delivered major reliability.
If you’d like, I can:
Solution: Your browser is sending plain text, but your printer expects raw ESC/POS. In your JavaScript code, ensure qz.websocket.connect() is called before sending data. Also, verify the encoding in the print() promise.
Below is a minimal, production‑ready snippet that works on all platforms with QZ Tray 19.8.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>QZ Tray 19.8 Demo</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/qz-tray/2.2.0/qz-tray.js"></script>
</head>
<body>
<button id="printBtn">Print Receipt</button>
<script>
// 1. Connect to the tray
qz.websocket.connect().then(() => console.log('QZ Tray connected'))
.catch(err => console.error('Connect error:', err));
// 2. Define a simple ESC/POS receipt (raw bytes)
const receipt = [
'\x1b\x40', // Initialize printer
'My Store\n',
'-----------------------\n',
'Item A $9.99\n',
'Item B $5.00\n',
'-----------------------\n',
'TOTAL $14.99\n',
'\x1d\x56\x41' // Cut paper
];
// 3. Set up the print config
const config = qz.configs.create('POS-Printer',
raw: true, // send raw bytes
encoding: 'UTF-8',
// optional: set DPI, margins, etc.
);
// 4. Wire the button
document.getElementById('printBtn').addEventListener('click', () =>
qz.print(config, receipt)
.then(() => console.log('Print succeeded'))
.catch(err => console.error('Print error:', err));
);
</script>
</body>
</html>
Key points for 19.8:
Headline: Critical Updates and Stability Improvements Released for QZ Tray
The QZ Tray team is excited to announce the latest release candidates are now available for public download. Whether you are looking for the cutting-edge features of the 19 (2.1.9) branch or the long-term stability of the 8 (1.8) series, the new packages are ready for deployment.
Upon first launch, QZ Tray will generate a self-signed SSL certificate. Your browser will show a warning when connecting to https://localhost:8181. You must add a security exception or install the certificate as trusted.
Always download QZ Tray from the official GitHub repository or the QZ Tray website to avoid modified or malicious installers. Look for:
