How to Fix “Serve Images in Next-Gen Formats” (Without Plugins or Coding)

Ran a PageSpeed Insights test and got hit with this warning?

“Serve images in next-gen formats”

It means your website is using outdated, heavy image formats like PNG or JPG — and Google wants you to switch to WebP or AVIF.

The good news? You can fix this in seconds using a free, no-code tool: pngtowebp.org.

🧠 What Are Next-Gen Image Formats?

WebP is a modern image format developed by Google. It offers:

• 📉 30–40% smaller file sizes than PNG or JPG
• 🧊 Full transparency support (like PNG)
• 📈 Better SEO and Core Web Vitals performance
• 📱 Faster loading on mobile and slow networks

This is why PageSpeed Insights (and Lighthouse, GTmetrix, etc.) recommends switching all your website images to WebP or AVIF.

🚀 How to Fix the “Next-Gen Format” Warning Instantly

Use pngtowebp.org — the fastest, free PNG to WebP converter online.

1. Visit pngtowebp.org
2. Upload your PNG (or JPG) images
3. Click “Convert”
4. Download the WebP version
5. Replace your site images with the optimized versions

That’s it. No plugins. No coding. No complexity.

✅ Your images will look identical ✅ File size drops instantly ✅ Your PageSpeed score goes up ✅ Your Core Web Vitals pass

📉 Why This Warning Hurts Your Rankings

If you don’t fix it, your site will continue to score lower in:

• LCP (Largest Contentful Paint) — how fast your main image loads
• CLS (Cumulative Layout Shift) — bloated images = layout jank
• Overall PageSpeed Score — image issues drag it down

And Google uses this data to decide whether your page is worth ranking.

🔧 What If I Use WordPress?

Most WordPress sites still use PNG and JPG by default. Even popular themes don’t auto-convert.

pngtowebp.org works perfectly with:

• 🧱 WordPress
• ⚙️ Shopify
• 💻 HTML/JS-based sites
• 🧪 Webflow, Framer, Squarespace, Wix

Just replace your uploaded PNGs with WebPs — and enjoy faster load times.

🙋 FAQ: Serve Images in Next-Gen Formats

✅ Do I have to change every image?

Not necessarily. Start with the biggest ones: banners, product photos, hero images.

✅ Will WebP break my layout or reduce quality?

Nope! Same transparency, same sharpness — smaller file size.

✅ Do I need a plugin?

Not at all. pngtowebp.org handles everything in-browser.

✅ Is this free?

Yes. No ads. No limits. No watermarks. 100% free forever.

⚡ Fix the Warning — and Speed Up Your Site Now

Don’t let a simple image format hold your site back.

Click here to convert your PNG to WebP now →

Say goodbye to PageSpeed warnings. Say hello to faster loading, higher rankings, and better UX.

pngtowebp.org — The easiest fix for slow websites.