JPG to WebP Converter: Free & Private
You have a folder of JPGs making a website slow. Convert it here, in your browser, with nothing uploaded anywhere.
Why convert JPG to WebP?
Images are usually the biggest thing a page downloads. Moving a JPG library to WebP usually removes a quarter to a third of the bytes with no visible difference. Because Core Web Vitals feed into search ranking, the payoff shows up in more than just the loading bar.
The catch worth knowing about
Re-encoding an already-lossy JPG into lossy WebP is a second generation of loss. At the default quality it is invisible, but do not run the same image through repeatedly, always convert from the best original you still have.
One tip before you start
Keep the original JPGs. WebP is for serving; the JPG is your master until you have something better.
JPG vs WebP, quick comparison
| Property | JPG | WebP |
|---|---|---|
| Best for | The universal image format. Works on every device, website, and app on earth. Slightly lossy but adjustable quality. | Google's modern web format. Excellent compression with transparency and animation support. |
| File size | Small and adjustable, the baseline everything else is measured against | Roughly 25-35% smaller than JPG |
| Transparency | No, transparency becomes white | Yes, full 8-bit alpha |
| Where it opens | Universal. Nothing has ever refused a JPG | Every browser; patchy in desktop and print software |
How to convert JPG to WebP
- Drop your JPG files into the box above (or click to browse).
- Press Convert, it happens instantly on your device.
- Download each converted file, or grab them all as a ZIP.
Frequently asked questions
Why would I convert JPG to WebP?
You have a folder of JPGs making a website slow. Images are usually the biggest thing a page downloads. Moving a JPG library to WebP usually removes a quarter to a third of the bytes with no visible difference. Because Core Web Vitals feed into search ranking, the payoff shows up in more than just the loading bar.
What should I watch out for when converting JPG to WebP?
Re-encoding an already-lossy JPG into lossy WebP is a second generation of loss. At the default quality it is invisible, but do not run the same image through repeatedly, always convert from the best original you still have.
Any tips for getting the best WebP out of a JPG file?
Keep the original JPGs. WebP is for serving; the JPG is your master until you have something better.
Will I lose quality converting JPG to WebP?
WebP is lossy at the default setting, and at 92% quality the difference is not visible at normal viewing size. What you get back is a file roughly a third smaller than the JPG equivalent.
Do my JPG files get uploaded?
No. The conversion runs on your device, in the browser tab you are reading this in. You can prove it: disconnect from the internet and convert anyway.
Is it free, and how many JPG files can I do at once?
Free, with no sign-up, no watermark and no daily limit. Up to 200 files per batch, downloadable individually or as one ZIP.
Related conversions
WebP is not the only thing a JPG file can become, and JPG is not the only thing that converts to WebP. These run on the same converter, on your device, with the same 200-file batch limit.
Guides
Longer walk-throughs covering JPG and the way this converter handles it.
Related tools
Once your images are converted, these on-device tools can help you prepare them for sharing or upload.