rn-camera-barcode-scan

A high-performance, real-time barcode scanner component for React Native (Expo). Supports 15+ barcode formats on both Android and iOS with native performance.

• Android — CameraX + Google ML Kit (on-device, no internet required)
• iOS — AVFoundation native barcode engine

Features

• 15+ barcode formats (QR, EAN, Code 128, Data Matrix, and more)
• Real-time green bounding box overlay on decoded barcodes
• Torch / flash control
• Pause & resume camera without unmounting (isActive)
• Close-range autofocus optimization
• Scans only within the visible view area — not the full sensor
• Works with both Old Architecture (Bridge) and New Architecture (Fabric + TurboModules)

Supported Barcode Formats

Format	Android	iOS
QR Code	✅	✅
EAN-8	✅	✅
EAN-13	✅	✅
Code 128	✅	✅
Code 39	✅	✅
Data Matrix	✅	✅
PDF417	✅	✅
Aztec	✅	✅
UPC-A	✅	—
UPC-E	✅	✅

Installation

npx expo install rn-camera-barcode-scan

Quick Start

import { BarcodeScanner, requestCameraPermission } from "rn-camera-barcode-scan";

export default function App() {
  const [hasPermission, setHasPermission] = useState(false);

  useEffect(() => {
    requestCameraPermission().then((status) => {
      setHasPermission(status === "granted");
    });
  }, []);

  if (!hasPermission) return <Text>Camera permission required</Text>;

  return (
    <BarcodeScanner
      style={{ width: 320, height: 400, borderRadius: 12 }}
      onBarcodeScan={(result) => {
        console.log(result.type, result.data);
      }}
    />
  );
}

Requirements

• iOS 15.0+
• Android minSdk 24
• Expo SDK 52+
• React Native 0.76+

License

MIT