How to convert JPG to WebP
- Drop your JPG or JPEG files on the box, click Choose images, or paste. Up to 30 files can be converted together, and other formats in the same batch are converted too.
- WebP is already selected under Convert to. 80% is a good default for photos.
- Each file is converted in turn; the list shows the new size and any notes. Drag the preview divider to compare the original with the WebP copy.
- Download files one by one or click Download all (ZIP).
How much smaller is WebP?
Google’s WebP compression study found WebP files 25–34% smaller than JPG at the same measured quality (SSIM). That is an average across many photos; individual images vary.
One thing that surprises people: the quality numbers of different formats do not mean the same thing. On Pixdesk’s deliberately grainy sample photo, WebP at 80% (199 KB) was actually larger than JPG at 80% (180 KB), while WebP at 70% (104 KB) was smaller than JPG at 70% (122 KB). Grain is a worst case for every encoder. Compare files by size and appearance, not by the number on the slider: drag the divider, zoom to 100%, and lower the WebP quality until you see a difference.
| Sample photo, 1600 × 1067 | JPG | WebP |
|---|---|---|
| Quality 90% | 447 KB | 410 KB |
| Quality 80% | 180 KB | 199 KB |
| Quality 70% | 122 KB | 104 KB |
| Quality 60% | 86 KB | 73 KB |
On typical smooth photos, product shots and screenshots, WebP usually comes out clearly smaller at the same visual quality.
Converting an existing JPG
Each conversion from one lossy format to another adds a little new loss. If you still have the original camera file or a high-quality export, convert that instead of an already heavily compressed JPG. When you only have the JPG, a WebP quality of 75–85% avoids visibly compounding the artifacts.
WebP is displayed by all current major browsers. Safari cannot save it from a web page, so convert in Chrome, Edge or Firefox; Pixdesk warns you if your browser falls back to PNG.
Everything happens inside this browser tab. Pixdesk reads your files with the browser’s own image decoder, redraws them on a canvas in a background worker and saves the new file with the browser’s encoder. There is no upload endpoint on pixdesk.cc, and the page makes no network request while it works. You can check that yourself in two minutes with your browser’s Network panel.
Frequently asked questions
How do I convert JPG to WebP?
Drop the JPG photos here with WebP selected, set the quality, and download. Up to 30 photos can be converted per batch.
Is WebP smaller than JPG?
Usually. Google measured WebP 25–34% smaller than JPG at the same quality on average. Very grainy photos may need a lower WebP setting to beat JPG.
What quality should I use for WebP?
Start at 80% for photos and 85–90% for images with text. Compare at 100% zoom and go lower while the image still looks right.
Will converting JPG to WebP lose quality?
Both are lossy, so a little detail can be lost. At 80% or above the difference is not visible in normal viewing.
Can I use WebP on my website?
Yes. All current major browsers display WebP. Keep JPG copies if you also send images by email or to older software.
Why does Safari give me a PNG?
Safari displays WebP but cannot encode it from a canvas. Pixdesk keeps such files as PNG with the correct extension and tells you. Use another browser to create WebP.
Is EXIF data kept?
No. The WebP contains pixels only, so camera details and GPS coordinates are removed.
Are my photos uploaded?
No. Conversion runs in your browser.
Sources
- Google for Developers: WebP compression study — average WebP file 25–34% smaller than JPEG at equal SSIM
- Google for Developers: An image format for the Web (WebP) — lossy WebP 25–34% smaller than comparable JPEG; lossless WebP 26% smaller than PNG
- Can I use: toBlob() with image/webp — Safari does not encode WebP from a canvas
Sources checked on 19 October 2026.