How to Convert JPG to WebP: Images up to 30% Smaller
Google uses page load speed as a direct ranking factor. Images are typically the largest contributor to page weight — and this is where the modern WebP format offers the biggest savings. This guide shows you how to convert JPG to WebP and why it improves your Google PageSpeed score.
What Is WebP — and Why Is It Better Than JPG?
WebP was developed by Google and combines the strengths of JPG (photos) and PNG (transparency) in one modern, efficient format:
- 25–34% smaller file size compared to JPEG at the same visual quality
- Transparency (alpha channel) like PNG — for logos and graphics with backgrounds
- Animations like GIF — with significantly better compression
- Supported by all modern browsers (Chrome, Firefox, Safari from iOS 14, Edge)
Google PageSpeed Insights explicitly recommends WebP and AVIF as "next-gen image formats". Replacing JPG with WebP often results in a 5–15 point increase in PageSpeed score.
Step-by-Step: Convert JPG to WebP
- Open the Image Converter
Visit kodinitools.com/bildkonverter — free, no account needed.
- Upload your JPG images
Select one or more JPG files — batch conversion of multiple images at once is supported.
- Select WebP as the output format
In the format menu, choose WebP.
- Set quality
80–85% is ideal for websites: barely visible difference, but significantly smaller files.
- Convert & download
Click "Convert" — download as individual file or ZIP archive.
WebP vs. JPG vs. AVIF: Direct Comparison
| Format | Compression | Browser Support | Transparency |
|---|---|---|---|
| JPG | Good | Universal (100%) | No |
| WebP | Very good (+25–34%) | Modern (98%+) | Yes |
| AVIF | Excellent (+50%) | Latest browsers (~85%) | Yes |
| PNG | Lossless | Universal (100%) | Yes |
Recommendation: WebP is the sweet spot between compatibility and performance. AVIF is even better but browser support isn't broad enough for all websites yet.
When Should You Not Use WebP?
- Email attachments: Many email clients don't support WebP — use JPG or PNG
- Print files: Use TIFF or high-resolution JPG
- Very old browsers: IE11, Safari < 14 cannot display WebP
How Much Load Time Do I Actually Save?
A typical webpage with 20 product images at 200 KB each (JPG) means 4 MB per page load. With WebP at equivalent quality: only ~2.8 MB — a saving of 1.2 MB or 30%. On mobile connections, this translates into a measurable improvement in load time and Core Web Vitals score (LCP).
Convert JPG to WebP now — free, directly in the browser, no registration.
Open Image Converter →