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?
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