If your website still serves JPEG and PNG images, you're leaving a significant performance gain on the table. Google's WebP format - developed in 2010 and now universally supported - can reduce image file sizes by 25–35% compared to JPEG at the same visual quality. For image-heavy websites, this translates to faster load times, better user experience, and improved Google rankings.
What is WebP?
WebP is a modern image format developed by Google that uses both lossy and lossless compression. It supports transparency (like PNG), animations (like GIF), and achieves significantly smaller file sizes than older formats - all without visible quality loss to the human eye.
WebP vs JPEG vs PNG - The Numbers
| Feature | WebP | JPEG | PNG |
|---|---|---|---|
| File Size (photos) | Smallest | Medium | Largest |
| Transparency | ✓ Yes | ✗ No | ✓ Yes |
| Animation | ✓ Yes | ✗ No | ✗ No |
| Browser Support | 95%+ modern | 100% | 100% |
| Quality at 85% setting | Excellent | Good | Lossless only |
How WebP Improves Your Google Rankings
Google's Core Web Vitals - specifically Largest Contentful Paint (LCP) - directly measure how fast your largest image loads. A slower LCP hurts your rankings. Converting images to WebP is one of the fastest ways to improve LCP because:
- Smaller file sizes download faster, even on slow mobile connections
- Faster downloads reduce Time to First Byte indirectly
- Google PageSpeed Insights explicitly recommends "Serve images in next-gen formats"
- Better scores lead to higher rankings in Google's page experience ranking factor
A typical e-commerce product page with 10 product images at ~150KB JPEG each = 1.5MB of images. Converting to WebP at 85% quality brings this down to ~975KB - a 35% reduction. On a 4G connection, that's roughly 0.8 seconds faster page load. That matters for both users and Google.
Browser Support - Is WebP Safe to Use?
As of 2025, WebP is supported by all major browsers including Chrome, Firefox, Safari (14+), Edge, and Opera - covering over 95% of global web users. For the remaining 5% on older Safari or IE, you can use the HTML <picture> element to serve WebP with a JPEG fallback.
How to Convert Your Images to WebP
The easiest way is to use our free browser-based converter - no file upload, completely private:
- Visit our JPG to WebP Converter or PNG to WebP Converter
- Upload your images (up to 20 at once)
- Set quality to 85% (recommended)
- Click Convert and download
For developers, you can also use command-line tools like cwebp (Google's official tool), ImageMagick, or build-time tools like Webpack/Vite plugins that auto-convert images during your build process.
Convert Your Images to WebP - Free & Instant
No upload, no signup. All conversion happens in your browser. Download individually or as a ZIP.
JPG to WebP → PNG to WebP →