WebP is now supported by all major browsers — Chrome, Firefox, Safari, Edge — and it consistently delivers smaller file sizes than JPG at equivalent visual quality. Converting your existing JPG images to WebP is one of the quickest wins for website performance, reducing image file sizes by 25–35% with no visible quality difference to site visitors.
JPG vs. WebP — The Numbers
Google's own testing shows that WebP lossy compression is approximately 25–34% smaller than JPEG at equivalent SSIM quality index. For a typical blog with 10–20 images per article, switching from JPG to WebP can save hundreds of kilobytes per page load — the difference between a fast site and a slow one on mobile connections.
| Image | JPG Size | WebP Size | Saving |
|---|---|---|---|
| Typical blog photo (800px) | 120 KB | 80 KB | 33% |
| Hero image (1920px) | 400 KB | 265 KB | 34% |
| Thumbnail (400px) | 45 KB | 30 KB | 33% |
How to Convert JPG to WebP
- Open the Image Converter at imgresizr.com.
- Upload your JPG file.
- Select WebP as the output format.
- Choose a quality setting — 80% is the recommended starting point for web use.
- Click Convert and download your WebP file.
Deploying WebP Images
Use the HTML Picture Element
Serve WebP to modern browsers while keeping JPG as a fallback using the <picture> element and srcset. This ensures perfect compatibility with all browsers, even those that don't support WebP (a tiny minority in 2025).
CDNs Can Auto-Convert
Services like Cloudflare, Cloudinary, and Imgix can automatically serve WebP versions of your JPG images to compatible browsers — without any manual conversion needed. This is ideal for large websites with hundreds of existing JPG images.
Convert JPG to WebP Now
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