Bookmarklet to Download All Images from Any Page

This version also extracts CSS background images:

javascript:(function(){
  const images = [];
  
  // Get regular images
  document.querySelectorAll('img').forEach(img => {
    if(img.src && img.naturalWidth > 100) images.push(img.src);
  });
  
  // Get background images
  document.querySelectorAll('*').forEach(el => {
    const bg = getComputedStyle(el).backgroundImage;
    const match = bg.match(/url\(["']?(.+?)["']?\)/);
    if(match) images.push(match[1]);
  });
  
  const unique = [...new Set(images)];
  console.log(`Found ${unique.length} images including backgrounds`);
  // ... rest of the code
})();

Only download large, high-quality images:

javascript:(function(){
  const minWidth = prompt('Minimum width (pixels):', '500') || 500;
  const images = Array.from(document.querySelectorAll('img'))
    .filter(img => img.naturalWidth >= minWidth)
    .map(img => ({
      src: img.src,
      width: img.naturalWidth,
      height: img.naturalHeight
    }));
  
  console.log(`Found ${images.length} images >= ${minWidth}px wide`);
  // Display with dimensions info
})();

Copy all image URLs instead of downloading:

javascript:(function(){
  const images = Array.from(document.querySelectorAll('img'))
    .filter(img => img.src && img.naturalWidth > 100)
    .map(img => img.src);
  
  const text = images.join('\n');
  navigator.clipboard.writeText(text).then(() => {
    alert(`Copied ${images.length} image URLs to clipboard!`);
  });
})();