How much smaller will my JPG get?
It depends on how compressed the JPG already is. A 645 KB test photo became 559 KB. A heavily compressed JPG may shrink very little, while a high-quality one shrinks more.
JPG to WebP Converter – Convert JPEG to WebP Online
Convert a JPG or JPEG to a lossy WebP at 90% quality. How much smaller it gets depends on how compressed the JPG already is.
If this tool isn’t working as expected, please take a screenshot of the error and report the problem here so we can investigate and improve it.
About this tool
Re-encodes a JPG as a lossy WebP at a fixed 90% quality and the same pixel size. Both formats are lossy, so this is a second round of compression: a 645 KB test photo became 559 KB, about 13% smaller.
The conversion runs in your browser, so the JPG is not uploaded.
A JPG that is already heavily compressed gains little from WebP, and a lightly compressed one gains more. If you still have the original image or a PNG export, converting that instead avoids compressing twice.
How to Use JPG to WebP Converter
Choose a JPG
Select a JPG or JPEG file from your device.
Automatic conversion
The JPG is re-encoded as WebP at a fixed 90% quality, at the same pixel size. If your browser can't create WebP files, the tool shows a message.
Compare
Check the preview against the original.
Save the WebP
Download the file. It is named like photo_converted_codittools.webp.
Common Workflows
Lightening images for a page
Convert JPG photos to WebP before adding them to a web page, and compare file sizes before replacing the originals.
Examples
A photo
Source
photo.jpg - 1440×960, 645 KBResult
photo_converted_codittools.webp - 1440×960, 559 KBAbout 13% smaller for this photo. A JPG saved at a lower quality would shrink less.
Limitations
Compresses a second time
JPG to WebP re-encodes already-lossy data, so there is a small extra loss, and no lossless option.
Fixed 90% quality
There is no quality setting, so you can't trade size for quality.
Not accepted everywhere
Some older editors and upload forms reject WebP. Keep the JPG for those.
FAQs
Both JPG and WebP are lossy, so the saving varies. These answers deal with how much to expect, quality, and converting a set of photos.
Does converting a JPG to WebP lose more quality?
Slightly. Both JPG and WebP are lossy, and the WebP is saved at a fixed 90% quality, so it is a second round of compression rather than an exact copy.
Can I convert a set of JPG photos to WebP at once?
This converter takes one JPG at a time. The Bulk Image Converter takes many JPG files and returns WebP files in one ZIP.
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