expo-merge-base64-images

A native Expo module that merges two base64-encoded images into a single PNG image on Android.

📦 Installation

For managed Expo projects

❗ This module requires a custom development client (i.e. not supported in Expo Go).

1. Install the package:

npx expo install expo-merge-base64-images

2. Run your app with a custom development client:

npx expo run:android

For bare React Native projects

1. Install the package:

npm install expo-merge-base64-images

2. Install native dependencies:

npx pod-install

🔧 Android Configuration

No additional steps required if you’re using expo run:android.

📖 Usage

import mergeImages from 'expo-merge-base64-images';

const result = await mergeImages(base64_1, base64_2);
// result is a base64-encoded PNG image

You can then convert it to a file, use it in an <Image> component, or upload it.

📚 API

mergeBase64Images(base64_1: string, base64_2: string): Promise<string>

Returns a base64-encoded PNG that combines the two input images vertically.

🤝 Contributing

Contributions are very welcome! Please refer to the Expo contributing guide.