HeicJpgConverter/Program.cs

using System;
using System.IO;
using ImageMagick;

class Program
{
    static void Main(string[] args)
    {
        string inputFolder;
        if (args.Length > 0)
        {
            inputFolder = args[0];
        }
        else
        {
            Console.Write("Enter the path to the folder containing HEIC images: ");
            inputFolder = Console.ReadLine()!;
        }

        if (!Directory.Exists(inputFolder))
        {
            Console.WriteLine($"Error: The folder '{inputFolder}' does not exist.");
            return;
        }

        // Create an output subfolder
        string outputFolder = Path.Combine(inputFolder, "Converted_JPGs");
        Directory.CreateDirectory(outputFolder);

        // Get all .heic and .HEIC files
        string[] files = Directory.GetFiles(inputFolder, "*.heic", SearchOption.TopDirectoryOnly);

        Console.WriteLine($"Found {files.Length} HEIC file(s) in '{inputFolder}'.");

        int converted = 0;
        foreach (var file in files)
        {
            try
            {
                using var image = new MagickImage(file);
                // Optionally set quality (0-100)
                image.Quality = 90;

                // Build output filename
                string fileName = Path.GetFileNameWithoutExtension(file) + ".jpg";
                string outputPath = Path.Combine(outputFolder, fileName);

                image.Write(outputPath, MagickFormat.Jpeg);
                converted++;
                Console.WriteLine($"Converted: {file} -> {outputPath}");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Failed to convert '{file}': {ex.Message}");
            }
        }

        Console.WriteLine($"Done. Converted {converted}/{files.Length} images. Output folder: {outputFolder}");
    }
}