इमेज टू Base64 कनवर्टर - ऑनलाइन एनकोड और डीकोड

// === Image to Base64 Encoding (Browser) ===

// Encode image file to Base64 Data URI
function imageToBase64(file) {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.onload = () => resolve(reader.result);
    reader.onerror = () => reject(new Error('Failed to read file'));
    reader.readAsDataURL(file);
  });
}

// Extract raw Base64 from Data URI
function extractRawBase64(dataUri) {
  const commaIndex = dataUri.indexOf(',');
  return commaIndex !== -1 ? dataUri.substring(commaIndex + 1) : dataUri;
}

// Format output for different use cases
function formatBase64Output(dataUri, format) {
  switch (format) {
    case 'raw': return extractRawBase64(dataUri);
    case 'html': return `<img src="${dataUri}" alt="" />`;
    case 'css': return `background-image: url(${dataUri});`;
    default: return dataUri;
  }
}

// === Base64 to Image Decoding ===

function base64ToBlob(base64Input) {
  let dataUri = base64Input.trim();
  if (!dataUri.startsWith('data:')) {
    dataUri = `data:image/png;base64,${dataUri}`;
  }
  const [header, data] = dataUri.split(',');
  const mimeMatch = header.match(/data:(.*?);/);
  const mimeType = mimeMatch ? mimeMatch[1] : 'image/png';
  const byteString = atob(data);
  const byteArray = new Uint8Array(byteString.length);
  for (let i = 0; i < byteString.length; i++) {
    byteArray[i] = byteString.charCodeAt(i);
  }
  return new Blob([byteArray], { type: mimeType });
}

// Usage
const input = document.querySelector('input[type="file"]');
input.addEventListener('change', async (e) => {
  const file = e.target.files[0];
  const dataUri = await imageToBase64(file);
  console.log('HTML:', formatBase64Output(dataUri, 'html'));
});