compress.js

const sharp = require('sharp');
const fs = require('fs');
const path = require('path');

const publicDir = path.join(__dirname, 'public');

async function compressImages() {
  const files = fs.readdirSync(publicDir);
  const pngFiles = files.filter(f => f.endsWith('.png'));
  
  console.log(`Found ${pngFiles.length} PNG files to compress`);
  
  for (const file of pngFiles) {
    const inputPath = path.join(publicDir, file);
    const outputPath = path.join(publicDir, file.replace('.png', '.webp'));
    
    try {
      const stats = fs.statSync(inputPath);
      await sharp(inputPath)
        .webp({ quality: 80 })
        .toFile(outputPath);
      
      const newStats = fs.statSync(outputPath);
      const savings = ((1 - newStats.size / stats.size) * 100).toFixed(1);
      console.log(`✓ ${file} → ${file.replace('.png', '.webp')} (${(stats.size/1024).toFixed(0)}KB → ${(newStats.size/1024).toFixed(0)}KB, -${savings}%)`);
    } catch (err) {
      console.error(`✗ Failed: ${file}`, err.message);
    }
  }
  
  console.log('\nDone! You can now delete the original .png files.');
}

compressImages();