HEIC to PNG/JPG Converter #

A Flutter package to convert HEIC images to PNG or JPG format on both web and mobile platforms.

Features #

• Convert HEIC images to PNG or JPG format
• Support for Web, iOS, and Android platforms
• Simple API with dedicated functions for PNG and JPG conversion
• Adjustable quality for JPG output

Getting Started #

Installation #

Add this package to your pubspec.yaml:

dependencies:
  heic_to_png_jpg: ^0.1.0

Run:

flutter pub get

Web Setup #

For web support, add the following script to your web/index.html:

<script src="https://cdn.jsdelivr.net/npm/libheif-js@1.18.2/libheif/libheif.min.js"></script>

Usage #

import 'package:heic_to_png_jpg/heic_to_png_jpg.dart';
import 'dart:typed_data';

Future<void> convertImage() async {
  // Get your HEIC image data as Uint8List
  Uint8List heicData = ...; // from file, network, etc.
  
  try {
    // Convert to PNG
    Uint8List pngData = await HeicConverter.convertToPNG(heicData: heicData);
    
    // Convert to JPG with custom quality
    Uint8List jpgData = await HeicConverter.convertToJPG(
      heicData: heicData,
      quality: 80,
    );
    
    // Use the converted image data
    // ...
  } catch (e) {
    print('Error converting image: $e');
  }
}

Example with FlutterFlow #

Integrate this package with FlutterFlow using custom functions:

// In your FlutterFlow custom functions
Future<Uint8List> convertHeicToPng(Uint8List heicData) async {
  return await HeicConverter.convertToPNG(heicData: heicData);
}

Future<Uint8List> convertHeicToJpg(Uint8List heicData, int quality) async {
  return await HeicConverter.convertToJPG(heicData: heicData, quality: quality);
}

Notes #

• Mobile: Uses the heif_converter package for iOS and Android, which requires temporary file operations.
• Web: Requires the libheif-js script in index.html for HEIC decoding.
• Fallback: If heif_converter fails or is unsupported, the package falls back to the image package, which may have limited HEIC support.

Issues and Contributions #

Please file any issues, bugs, or feature requests on our GitHub page.

License #

This project is licensed under the MIT License - see the LICENSE file for details.