quizz/image2b64.html at main · ericperret/quizz · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Image Resizer and Base64 Exporter</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 20px;
        }
        canvas {
            border: 1px solid #ccc;
            margin: 20px 0;
        }
        button, input {
            margin: 10px;
        }
    </style>
</head>
<body>
    <h1>Charger et Redimensionner Image</h1>

    <input type="file" id="imageInput" accept="image/*">
    <canvas id="canvas" width="256" height="256"></canvas>
    <button id="exportBtn" disabled>Exporter Base64 vers image_B64.txt</button>

    <script>
        const imageInput = document.getElementById('imageInput');
        const canvas = document.getElementById('canvas');
        const ctx = canvas.getContext('2d');
        const exportBtn = document.getElementById('exportBtn');

        imageInput.addEventListener('change', (event) => {
            const file = event.target.files[0];
            if (file) {
                const reader = new FileReader();
                reader.onload = (e) => {
                    const img = new Image();
                    img.onload = () => {
                        // Redimensionner l'image à 256x256
                        ctx.clearRect(0, 0, canvas.width, canvas.height);
                        ctx.drawImage(img, 0, 0, 256, 256);
                        exportBtn.disabled = false;
                    };
                    img.src = e.target.result;
                };
                reader.readAsDataURL(file);
            }
        });

        exportBtn.addEventListener('click', () => {
            // Exporter en base64
            const base64 = canvas.toDataURL('image/jpeg'); // Ou 'image/png' si préféré
            const blob = new Blob([base64], { type: 'text/plain' });
            const url = URL.createObjectURL(blob);
            const a = document.createElement('a');
            a.href = url;
            a.download = 'image_B64.txt';
            document.body.appendChild(a);
            a.click();
            document.body.removeChild(a);
            URL.revokeObjectURL(url);
        });
    </script>
</body>
</html>