Kompress

Compress product photos to WebP, write AI alt text, and test page speed for a faster store

Kompress makes product photos lighter while keeping them sharp. It re-encodes images as WebP and swaps them in place, keeping image order, featured image and variant images intact. Originals stay in your Files as a backup. Alt Writer uses AI to describe each product photo and writes alt text you can review and apply in bulk. Autopilot compresses images on new products automatically, and Speed Lab runs Lighthouse tests so you can track page performance.

• Compress product photos to WebP and swap them in place, no re-upload needed
• Keeps image order, featured image and variant images exactly as you set them
• AI Alt Writer describes each photo and applies alt text in bulk