How to Use

Assuming you have Minecraft Bedrock Edition installed via the Microsoft Store (default paths), simply run the batch script. It will automatically request administrator privileges since Minecraft is located in the protected Program Files directory.

The embedded Base64 image is decoded into a PNG using Windows' built-in certutil utility, which then replaces the default Minecraft splash screens. The custom image reads "Mojank" instead of "Mojang" - a small tribute to the game's ever increasing number of unresolved bugs, the visible lack of quality control, and anti-consumer features.

Customization

You can modify this script to replace images anywhere on your system with any other image. Here's how:

1. Convert your image to Base64

Use a site like base64-image.de

2. Split the Base64 string

Batch scripts have a ~8000 character line limit. For example, you can use this C# helper to split long Base64 strings into chunks:

public static void SplitBase64ForBatchScript(string inputFilePath)
{
    string outputFilePath = Path.Combine(
        Path.GetDirectoryName(inputFilePath),
        Path.GetFileNameWithoutExtension(inputFilePath) + "_split.txt"
    );

    string content = File.ReadAllText(inputFilePath).Trim();
    const int chunkSize = 7000;
    
    using (StreamWriter writer = new StreamWriter(outputFilePath))
    {
        for (int i = 0; i < content.Length; i += chunkSize)
        {
            int length = Math.Min(chunkSize, content.Length - i);
            string chunk = content.Substring(i, length);
            writer.WriteLine($"echo {chunk}");
        }
    }
}

3. Embed into batch

Copy the generated echo lines into the batch script between the parentheses where the Base64 data goes.