How much smaller is WebP than JPG?

At equivalent perceived quality, lossy WebP is typically 25–34% smaller than JPG. The exact saving depends on the image's content.

Will converting JPG to WebP lose quality?

Going from one lossy format to another always involves a small amount of re-compression. At 80% quality or higher the difference is usually invisible, and the file is meaningfully smaller.

Where can I use WebP files?

WebP works in virtually all modern browsers and is ideal for websites. Some older desktop apps and email clients still don't accept it — keep a JPG copy if you need to send images to those.

Are my photos uploaded?

No. Conversion runs locally in your browser; your photos never leave your device.

Convert JPG to WebP — 25–35% Smaller Photos

The case for WebP over JPG

JPG has been the default photo format for three decades, and it's still excellent. But WebP, designed by Google specifically for the web, compresses photographs more efficiently using the same lossy approach plus smarter prediction. In practice that means a WebP file roughly 25–35% smaller than a JPG at the same visual quality. Across a whole page of images, that adds up to a faster load and a better Core Web Vitals score.

What to expect when re-compressing

Your JPG is already lossy, so converting to WebP re-compresses an image that's been compressed once. This isn't a problem at sensible quality settings — at 80% or above the change is generally imperceptible — but it's worth knowing. Don't repeatedly round-trip the same image between lossy formats, and keep your original if you might need to re-export later.

Resize while you convert

If your JPGs are full-resolution camera files but they'll be displayed small, set a Max width (e.g. 1920px). Resizing before encoding compounds the WebP savings dramatically.

How to convert

Output is set to WebP and quality to 80%. Adjust to taste.
Drop your JPG files above, or click to browse.
Check the per-file savings, then download individually or as a ZIP.

Just want smaller JPGs without changing format?

Re-compress JPGs in place with the quality slider.

Compress JPG

More background: JPG vs PNG vs WebP and resizing images for the web.

Frequently asked questions

How much smaller is WebP than JPG?: At equivalent perceived quality, lossy WebP is typically 25–34% smaller than JPG. The exact saving depends on the image's content.
Will converting JPG to WebP lose quality?: Going from one lossy format to another always involves a small amount of re-compression. At 80% quality or higher the difference is usually invisible, and the file is meaningfully smaller.
Where can I use WebP files?: WebP works in virtually all modern browsers and is ideal for websites. Some older desktop apps and email clients still don't accept it — keep a JPG copy if you need to send images to those.
Are my photos uploaded?: No. Conversion runs locally in your browser; your photos never leave your device.