The JPG to WebP Converter re-encodes JPG photographs as WebP, the format most sites now serve to cut page weight. Google's published study measured lossy WebP at 25 to 34 percent smaller than JPEG at equal visual quality, and on a page with many photos that difference shows up directly in load time. The quality starts at 80, which looks about the same as a well-made JPG while keeping most of that saving. What the converter cannot do is beat physics on a file that is already heavily compressed: a JPG saved at quality 60 has little left to remove, and re-encoding it high can even produce a larger WebP. So each card shows the exact size change, and each result can be compared with its JPG at full size before you use it. Rotation recorded in the photo's EXIF data is applied to the pixels, so nothing arrives sideways. Safari can display WebP but cannot write it from a page, so to make WebP files use Chrome, Edge or Firefox. Convert up to fifty photos at once and take them as a single ZIP.
The guide behind this tool
Serving WebP on Your Site: picture, Accept Headers and the Vary Trap
The picture element or server negotiation, and the one missing header that lets a cache hand WebP to everyone. Plus where the JPG should stay.
Drop your JPG photos onto the box, or click to choose them. Fifty is the batch limit.
Each converts to WebP at quality 80 straight away.
Check the size change on each card. Most camera and stock photos shrink by a quarter or more.
Open Compare with original on one or two images to be sure the quality holds. Raise the setting and press Convert if anything looks soft.
Download the WebP, or the batch as a ZIP, and keep the original JPGs as the fallback for older software and email.
Usually somewhere between a quarter and a half, depending on how the JPG was saved. Google's own measurement was 25 to 34 percent at equal quality. A JPG saved at a high quality has more to give up and shrinks more. One that was already compressed hard can come out about the same, or larger, which is why each card shows the exact number. If a file grows, keep the JPG.
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