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St. Mary's Group of Institutions
Guntur For Women

Chebrolu, Guntur

St. Mary's Women's
Engineering College

Budampadu

St. Mary's Institutions

Voucher Entry System

Admin 1 📎 Link Excel

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Printer Setup & Direct Print

Configure direct printing to USB, Network, or Cloud printers

⚡ Print Engine Status
Recommended path: Detecting…
Only used when QZ Tray is connected
🔌 USB / Serial Printer (ESC/POS Thermal) Not connected

Connect a USB thermal receipt printer (ESC/POS compatible — e.g. Epson TM, Star TSP, Xprinter, GOOJPRT) directly from this browser using the Web Serial API (Chrome/Edge only). No drivers needed.

Ready — click Connect to pick your USB printer.
🌐 Network Printer (USB / Wi-Fi / LAN)

For USB printers connected to a computer, or Wi-Fi/LAN printers, the browser's built-in print dialog is the most reliable method. Use the settings below to pre-configure your preferred paper size so each print fires immediately without asking.

💡 Printer Tips & Compatibility

USB printer (Windows): Install printer via Windows Settings → Printers & Scanners. When the print dialog opens, select your printer by name from the list.

Network/Wi-Fi printer: Make sure the printer is on the same network. It will appear automatically in the print dialog under network destinations.

Thermal roll printer (ESC/POS): Use the USB / Serial Printer panel above with Chrome/Edge to print directly without a dialog.

To avoid "Save as PDF": In Chrome print dialog, look for the Destination dropdown and pick your physical printer. If you don't see it, click See more…

Default printer shortcut: Set your physical printer as the system default (Windows Settings → Printers & Scanners → right-click → Set as default). The dialog will always open with it pre-selected.

🚀 True Silent Printing — Setup Guide
Option A — Chrome Kiosk Printing (Recommended for POS)

Launch Chrome with the --kiosk-printing flag to bypass the print dialog entirely. The browser sends directly to the default printer — zero clicks, zero dialog.

# Windows — create a shortcut with this target:
"C:\Program Files\Google\Chrome\Application\chrome.exe" --kiosk-printing --kiosk https://yourserver/voucher.html
# macOS:
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --kiosk-printing --kiosk https://yourserver/voucher.html
# Without kiosk UI (just silent printing, normal browser chrome):
chrome.exe --kiosk-printing https://yourserver/voucher.html
Note: Set your physical printer as the Windows/macOS default printer first. Chrome will print to it silently without any dialog or destination prompt.
Option B — QZ Tray (Network/USB, most flexible)

QZ Tray is a free desktop service that gives browsers access to any printer (USB, network, shared). Install it once; then this app prints silently to any named printer.

# 1. Download and install QZ Tray:
https://qz.io/download/
# 2. Add qz-tray.js to this HTML file (before </body>):
<script src="https://cdn.qz.io/qz-tray/qz-tray.js"></script>
# 3. Enter the printer name above and click Print.
Option C — Electron Desktop App

For a fully self-contained POS terminal, wrap this HTML in Electron. The app calls webContents.print({silent:true}) — no dialog, no PDF prompt, direct to printer.

// main.js (Electron main process)
ipcMain.handle('silentPrint', async (event, opts) => {
const win = BrowserWindow.fromWebContents(event.sender);
return new Promise(resolve => {
win.webContents.print(
{ silent: true, printBackground: true,
deviceName: opts.printer || '',
pageSize: opts.paper || 'A4' },
(success, err) => resolve({success, err})
);
});
});
// preload.js — expose to renderer
contextBridge.exposeInMainWorld('electronAPI', {
silentPrint: (opts) => ipcRenderer.invoke('silentPrint', opts)
});

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