JPG to WebP Converter
Turn JPG photos into efficient WebP files without any server upload.
JPG vs WebP — Which Is Smaller?
WebP achieves 25–35% smaller file sizes compared to JPG at the same quality level. For a typical 500 KB photograph that means a WebP file of around 320–375 KB with no visible quality difference — directly translating to faster load times and lower bandwidth costs. Google, Facebook and virtually every major web platform now serve images in WebP.
WebP uses a more advanced compression algorithm (based on VP8 video encoding) that identifies and discards visual information more efficiently than JPG's DCT-based compression. The practical result: WebP images look the same to the human eye but take up significantly less space on disk and less time to transfer over the network.
WebP's Impact on Core Web Vitals
Google measures Largest Contentful Paint (LCP) as a Core Web Vitals ranking signal — how long it takes for the largest image or text block to render. Images are the LCP element on most pages. Switching from JPG to WebP reduces image transfer time, which directly improves LCP:
- A 600 KB JPG hero image served over a 4G connection (20 Mbps) takes ~240ms to transfer.
- The same image as a 400 KB WebP takes ~160ms — 80ms saved, which can shift your LCP from "Needs Improvement" to "Good" (Google's threshold is 2.5s).
- Google PageSpeed Insights explicitly recommends serving images in next-gen formats (WebP or AVIF) as a high-impact optimisation.
Recommended Quality Settings
| Use case | Recommended quality | Expected saving vs JPG |
|---|---|---|
| Hero images, product photos | 85–90% | 20–30% |
| Blog post images, social media | 80–85% | 25–35% |
| Thumbnails, previews | 70–80% | 30–40% |
| Maximum compression | 60–70% | 35–50% |
WebP Browser Support
WebP is supported by all modern browsers: Chrome, Firefox, Safari (since version 14), Edge, and Opera. The only browsers that don't support WebP are Internet Explorer and very old Safari versions. If you need to support IE or old Safari, use the HTML <picture> element to serve WebP to modern browsers and JPG as a fallback:
<picture>
<source srcset="image.webp" type="image/webp">
<img src="image.jpg" alt="Description">
</picture>Browsers that support WebP use the <source>; others fall back to the <img> JPG automatically.
WebP vs AVIF: Which Is Better?
AVIF is a newer format that achieves even better compression than WebP (often 40–50% smaller than JPG). However, AVIF has slightly lower browser support and slower encoding. WebP is the practical choice today: near-universal support, 25–35% smaller than JPG, and fast encoding. Use AVIF when maximum compression is critical and you can verify your users' browsers support it.