# Mharmal Printer > Connect web apps to Bluetooth & USB thermal printers via WebSocket Canonical page: [https://chrome-stats.com/d/com.escpos.printer](https://chrome-stats.com/d/com.escpos.printer) ## Overview - **ID:** `com.escpos.printer` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** KEISUUGIKEN - **Category:** TOOLS - **Downloads:** 188 - **Version:** 2.2.1 - **Last updated:** 2026-07-30 - **First published:** 2026-01-04 - **Publisher country:** JP - **Size:** 17 MB - **Data as of:** 2026-09-24 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.escpos.printer) - **Privacy policy:** [https://doc-hosting.flycricket.io/mharmal-printer-privacy-policy/5c86f117-ebbb-40e1-bfdb-9b9d65b29faa/privacy](https://doc-hosting.flycricket.io/mharmal-printer-privacy-policy/5c86f117-ebbb-40e1-bfdb-9b9d65b29faa/privacy) ## Description This application acts as a powerful print service driver, allowing any web-based application (POS, Inventory, Order Management) to communicate directly with ESC/POS thermal printers connected to your Android device via Bluetooth or USB.

Key Features:

- Universal Connectivity: Support for both Bluetooth and USB ESC/POS or StarPRNT thermal printers.
- WebSocket Bridge: Runs a local WebSocket server (default port 22300) on your Android device. Your web app simply connects to ws://localhost:22300 (or the device IP) to send print jobs.
- Background Service: The app runs as a robust background service, ensuring your connection stays active even when the screen is off or the app is minimized.
- Image Printing: Optimized for printing Base64 encoded images. Perfect for receipts, barcodes, and QR codes generated by your web app.
- Cash Drawer Support: Send commands to open the connected cash drawer.
- Paper Cut Support: Supports auto-cut commands for compatible printers.
- Live Status: Real-time connection status monitoring for both the WebSocket server and the printer.
- Diagnostics: Built-in tools to test connection and print quality.

How it Works:
- Connect: Pair your Bluetooth printer or plug in your USB thermal printer.
Start: Open the app and start the WebSocket service.
- Integrate: In your web application, connect to the WebSocket server running on the Android device.
- Print: Send Base64 image data or ESC/POS commands from your web app to print instantly.

Ideal For:
- Web-based Point of Sale (POS) systems running on Android tablets.
- Kitchen Display Systems (KDS) needing to print tickets.
- Inventory management apps requiring label printing.
- Any developer needing a bridge between a browser and a hardware printer.
Technical Details:

Default Port: 22300
Protocol: WebSocket (ws://)
Data Format: Base64 Encoded Images / Raw ESC/POS Bytes
Requirements:

Android 5.0+
Bluetooth- or USB OTG-capable device
ESC/POS-compatible thermal printer (58mm or 80mm)

Tested Devices:
- SEIKO SII RP-F10
- SEIKO SII MP-B20
- EPSON TM-m30
- MUNBYN TM-m30III
- Star Micronics Mc-Print3 ## Rankings - #1,774,894 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_COARSE_LOCATION` - `android.permission.ACCESS_FINE_LOCATION` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.BLUETOOTH` - `android.permission.BLUETOOTH_ADMIN` - `android.permission.BLUETOOTH_CONNECT` - `android.permission.BLUETOOTH_SCAN` - `android.permission.FOREGROUND_SERVICE` - `android.permission.FOREGROUND_SERVICE_CONNECTED_DEVICE` - `android.permission.FOREGROUND_SERVICE_DATA_SYNC` - `android.permission.INTERNET` - `android.permission.POST_NOTIFICATIONS` - `android.permission.QUICKBOOT_POWERON` - `android.permission.RECEIVE_BOOT_COMPLETED` - `android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS` - `android.permission.SYSTEM_ALERT_WINDOW` - `android.permission.WAKE_LOCK` - `com.android.vending.CHECK_LICENSE` - `com.escpos.printer.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` - `com.huawei.permission.external_app_settings.USE_COMPONENT` - `oppo.permission.OPPO_COMPONENT_SAFE` ## Similar extensions and apps - [Mobile Print Util](https://chrome-stats.com/d/com.samathosoft.mobileprintutil) — 46,917 users - [mPrintServer](https://chrome-stats.com/d/com.bixolon.mprintserver) — 8,705 users - [ESCPOS Bluetooth Print Service](https://chrome-stats.com/d/com.loopedlabs.escposprintservice) — 523,147 users, 4.28 / 5 - [Printer Server](https://chrome-stats.com/d/net.sinergics.helper.printer) — 5 users - [Quick Printer (ESC POS Print)](https://chrome-stats.com/d/pe.diegoveloper.printerserverapp) — 483,483 users, 3.53 / 5 - [WiFi Browser Print POS](https://chrome-stats.com/d/com.mubm.wifi_browser_print_pos) — 70 users - [Web Print Bridge](https://chrome-stats.com/d/com.arsas.web_esc_pos_bridge) — 29 users - [POS Print](https://chrome-stats.com/d/com.planetcoops.android.posprint) — 911 users - [MindPrinter](https://chrome-stats.com/d/com.mypefact.mindprinter) — 2 users - [Label Printer](https://chrome-stats.com/d/xp.print.printserviceneutral.xml) — 50,685 users, 3.67 / 5 - [ESC POS Wifi Print Service](https://chrome-stats.com/d/com.vesurethermalwifiprinter) — 187 users - [PrinterA: ESC/POS Print Driver](https://chrome-stats.com/d/com.logistara.printera) — 423,334 users, 2.93 / 5 --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.escpos.printer)