Convert JPG to WebP online for smaller, faster-loading images. Actual savings depend on your source JPG's compression level.
Google PageSpeed Insights and Lighthouse both flag JPG images as an opportunity to switch to a next-gen format like WebP, since WebP can compress more efficiently than JPG at a similar visual quality. This tool re-encodes your JPG as WebP at a fixed 90% quality setting - a lossy conversion, not a lossless one.
The actual size reduction depends on how much compression the source JPG already has: a lightly compressed, high-quality JPG typically shrinks more than one that's already heavily compressed. The conversion runs entirely in your browser.
WebP generally produces smaller files than JPG at a comparable quality, which is why Google PageSpeed Insights and Lighthouse flag JPG images as a next-gen format opportunity. How much smaller depends heavily on how compressed the source JPG already is.
Select your heavy JPG/JPEG files.
Converts and compresses JPG into modern WebP format.
Preview the optimized image quality.
Download the faster, lighter image file.
Convert JPG photos to WebP to address a Lighthouse 'serve images in next-gen formats' flag.
Convert a landing page's hero JPG to WebP to improve Largest Contentful Paint time.
Convert an ecommerce product photo library from JPG to WebP to cut bandwidth costs.
Use the Bulk Image Converter to convert many JPG files to WebP at once.
Compress the JPG directly with the Image Compressor if WebP support isn't confirmed yet on your target platform.
Best For
Source File
photo.jpg - 512x512, quality 92%, about 85 KBResult
photo.webp - 512x512, quality 90%, roughly comparable sizeBecause the source JPG was already fairly well compressed, re-encoding it to WebP produced only a modest reduction in this test - not the large savings sometimes advertised for this conversion. A JPG saved at a higher, less-compressed quality typically shows a bigger drop when converted to WebP.
Convert the flagged JPG images to WebP to directly address the PageSpeed Insights or Lighthouse recommendation.
Convert hero and gallery images from JPG to WebP to reduce total page weight and improve load time.
Convert a high-traffic image library from JPG to WebP to reduce the data transferred on every page load.
Problem
Solution
How much smaller a JPG gets when converted to WebP depends heavily on how compressed the source JPG already is. A heavily compressed JPG may shrink very little, while a lightly compressed, high-quality JPG typically shows a bigger reduction.
Problem
Solution
The tool encodes WebP at a fixed 90% quality - a lossy setting. It's visually close to the source for most photos, but it's re-encoding an already-lossy JPG, not preserving it pixel-for-pixel.
Problem
Solution
WebP displays correctly in all current major browsers, but some older software, email clients, and legacy platforms still don't support it. Keep the JPG on hand if you're unsure.
Since this is a lossy-to-lossy re-encode, starting from a heavily compressed JPG limits how much WebP can improve on it. A higher-quality source generally gives a better result.
Converting one file at a time works for a single hero image, but for an entire product or blog image library, the Bulk Image Converter handles many JPGs at once and returns a ZIP.
Hold on to the original JPG in case a platform or older browser in your audience doesn't display WebP correctly.
The tool always encodes at 90% quality with no lossless mode and no quality slider.
The size reduction depends entirely on the source JPG's existing compression level - there's no universal percentage that applies to every file.
This page converts a single JPG per run. For batches, use the Bulk Image Converter.
These solve different problems - WebP targets smaller web-ready files, while PNG targets lossless editing at the cost of a larger file.
| JPG to WebP | JPG to PNG | |
|---|---|---|
| File size | Usually smaller than the source JPG, though savings vary | Usually larger than the source JPG |
| Quality | Lossy re-encode at a fixed 90% quality | Lossless from this point forward |
| Best for | Web performance - faster-loading pages | Editing workflows that need to avoid further quality loss |
Which should you use?
Choose WebP when page load speed is the priority. Choose PNG when the image needs further editing and you want to avoid compounding JPG artifacts.
The question almost everyone has is how much smaller the file will actually get - the honest answer is that it depends entirely on the source JPG, which the FAQ below explains.
It depends entirely on how compressed the source JPG already is. A lightly compressed, high-quality JPG typically shrinks noticeably when converted to WebP; a JPG that's already heavily compressed may shrink very little. There's no fixed percentage that applies to every file.
Lossy. The tool encodes WebP at a fixed 90% quality setting, not a lossless mode. It's re-encoding an already-lossy JPG, so the result is visually close to the source for most images but not pixel-identical.
All current major browsers - Chrome, Firefox, Safari, and Edge - display WebP images correctly. A small number of older software versions and legacy platforms still don't support it, so keep the JPG on hand if you're unsure about the destination.
Yes. CoditTools processes the conversion entirely in your browser using JavaScript. Your files are never uploaded to any server.
Yes. Use the Bulk Image Converter tool on CoditTools to convert multiple JPG files to WebP in a single batch and download all results as one ZIP file.
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