Google ML Kit

Package

Free on-device barcode scanner for Android and iOS; doc scanner is Android-only

Price: Free, runs on device
Access: None, runs on device

About

Google's ML Kit runs on the device, offline and at no cost. Barcode scanning reads QR, EAN, UPC, PDF417 and other formats on Android and iOS, up to 10 codes per image. The document scanner flow, delivered by Google Play services, is Android-only (API 21+, 1.7 GB RAM).

What you can do with it

Scan QR codes and product barcodes from the camera in an Android or iOS app
Add a ready-made document scanner with edge detection to an Android app
Get scanned pages as PDF or JPEG without asking for camera permission on Android

Get started

Add com.google.mlkit:barcode-scanning to your Android app
Or add the GoogleMLKit/BarcodeScanning pod in your iOS app
Add play-services-mlkit-document-scanner for the Android scanner

Example

// Android (Kotlin): Google code scanner, no camera permission needed
GmsBarcodeScanning.getClient(this).startScan()
    .addOnSuccessListener { barcode -> println(barcode.rawValue) }

// Android only: document scanner that returns a PDF
val options = GmsDocumentScannerOptions.Builder()
    .setResultFormats(RESULT_FORMAT_PDF)
    .setScannerMode(SCANNER_MODE_FULL)
    .build()
GmsDocumentScanning.getClient(options).getStartScanIntent(this)
    .addOnSuccessListener { sender -> scannerLauncher.launch(IntentSenderRequest.Builder(sender).build()) }

Details

Hosting: Runs locally
Available in: Worldwide
Official SDKs: Kotlin, Java, Swift
MCP server: None