best way to compress images for web

The best way to compress images for the web is usually:

1. Use the right format

   • JPEG/WebP/AVIF for photos
   • PNG/WebP for images needing transparency
   • SVG for logos, icons, illustrations
   • AVIF is usually the smallest, but browser support and encoding speed can be tradeoffs
   • WebP is a great default for broad support and good compression

2. Resize before compressing

   • Don’t upload a 4000px-wide image if it only displays at 800px
   • Scale images to the largest size they’ll actually be shown

3. Use lossy compression when possible

   • For photos, lossy compression gives the biggest file size reduction
   • Start with quality around:
     • JPEG/WebP: 70–85
     • AVIF: often 40–60 works well
   • Adjust based on visual quality

4. Strip unnecessary metadata

   • Remove EXIF data, thumbnails, color profiles if not needed

5. Use responsive images

   • Serve different sizes using srcset and sizes
   • This helps mobile devices load smaller files

6. Automate optimization

   • Tools: Squoosh, ImageMagick, Sharp, ImageOptim, TinyPNG, libvips
   • In build pipelines, generate multiple sizes and formats automatically

Practical recommendation

• Photos: AVIF first, fallback to WebP, then JPEG
• Icons/logos: SVG
• Transparent graphics: WebP or PNG if necessary
• Always resize to display dimensions first

If you want, I can give you:

• a tool-by-tool workflow
• command line examples
• or the best settings for JPEG/WebP/AVIF.