WebP에서 PNG로: 10분 만에 이메일 캠페인을 저장한 방법

I spent weeks optimizing our landing page images as WebP. Page load dropped 40%. Lighthouse score hit 95.

Then marketing sent the weekly newsletter. Every product image was broken.

The Problem Nobody Talks About

Email clients do not render WebP. Gmail, Outlook, Mailchimp — none of them support it. All that optimization meant nothing when our customers saw broken image placeholders.

The Emergency Fix

I batch-converted 200 product photos back to PNG in one go. The tool preserved alpha channels on transparent product shots, which was critical — our previous converter flattened them to white backgrounds.

What I Use Now

webp2png.io handles batch WebP-to-PNG conversion including transparency. No upload, runs in the browser.

My rule: WebP for the web, PNG for everything else.

What format headaches have you dealt with?