index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Image Converter</title>
    <link rel="stylesheet" href="styles.css">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/cropperjs/1.5.12/cropper.min.css">
</head>
<body>
    <div class="container">
        <h1>Image Converter</h1>
        <input type="file" id="imageInput" accept="image/*" multiple>
        <div id="imageContainer">
            <img id="image" style="display: none;">
        </div>
        <button id="cropButton" style="display: none;">Crop</button>
        <canvas id="canvas" style="display:none;"></canvas>
    </div>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/cropperjs/1.5.12/cropper.min.js"></script>
    <script src="app.js"></script>
</body>
</html>