WebP has become the gold standard for web images. Google developed it specifically for the web, and it consistently delivers smaller file sizes than PNG — typically 25–35% smaller — while supporting transparency just like PNG does. Converting your PNGs to WebP is one of the simplest ways to speed up your website without changing any content.
PNG vs. WebP — A Quick Comparison
Both PNG and WebP support transparency. Both can handle images with sharp edges, text, and gradients. The key difference is file size: WebP consistently produces smaller files for the same visual quality. Google's own data shows WebP lossless files are 26% smaller than PNG, and WebP lossy files can be 25–34% smaller than comparable JPEGs.
| Format | Transparency | Typical File Size | Browser Support |
|---|---|---|---|
| PNG | Yes | Largest | Universal |
| WebP (lossless) | Yes | 26% smaller than PNG | 95%+ browsers |
| WebP (lossy) | Yes | Much smaller | 95%+ browsers |
How to Convert PNG to WebP
- Open the Image Converter at imgresizr.com.
- Upload your PNG file.
- Select WebP as the output format.
- Choose lossless (for logos/icons) or lossy (for photos/illustrations) mode.
- Download your WebP file and replace the PNG on your website.
Tips for Deploying WebP on Your Website
Use the HTML Picture Element
For maximum compatibility, use the HTML <picture> element to serve WebP to supporting browsers and PNG as a fallback. This ensures older browsers still see a valid image while modern browsers get the faster WebP.
WordPress Serves WebP Automatically
WordPress 5.8+ automatically converts uploaded images to WebP and serves them to compatible browsers. Upload your PNG normally and WordPress handles the rest — no manual conversion required for WordPress sites.
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