JPG to WebP Converter - Smaller Photos, No Upload

Browser-local tool

Use JPG to WebP

Your image is decoded and re-encoded on this device. No upload request is made.

Choose JPG or JPEGSelect a JPG or JPEG file from this device

Output format

Quality 92%

WebP preserves transparent pixels. Maximum quality minimizes further loss, but browser encoders do not guarantee mathematically lossless WebP.

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About JPG to WebP

Converting a photograph from JPG to WebP is usually a page-speed decision rather than a compatibility one. WebP applies newer prediction and entropy coding than the 1992 JPEG standard, so for the same perceived quality it typically lands somewhere between a fifth and a third smaller on photographic content. That difference shows up directly in Largest Contentful Paint on image-led pages, and in bandwidth bills for anyone serving a catalogue. Browser support stopped being the objection some years ago; every current engine decodes WebP natively. What has not changed is that a JPG is already a lossy file, which makes this conversion a second lossy pass rather than a clean re-container. This page explains where the savings genuinely come from and when the trade is not worth taking.

Shape and export choices

The JPG is decoded to raw pixels by the browser's own image pipeline, the same code path that paints the photo when it appears on a page. Orientation recorded in the source EXIF is applied during decode, so a phone photo does not emerge rotated.
A canvas is allocated at the source pixel dimensions. No resampling happens here: the conversion changes the encoding, not the geometry, so a 4032 by 3024 photo stays 4032 by 3024.
The pixels are encoded through the browser's WebP encoder at a high quality setting. This is lossy WebP, which is the mode that produces the size advantage on photographs; lossless WebP would usually be larger than the original JPG.
The resulting Blob is measured, and both the original and converted byte counts are displayed so you can confirm the saving was real for your particular image rather than assuming it.
EXIF fields, including any GPS coordinates the camera recorded, are not carried into the output. Stripping them is intentional for images headed to a public site.

Good fits for JPG to WebP

Product photography for a storefront

A gallery of thirty product shots at roughly 400KB each converts to WebP and drops the page's image payload substantially. Serve WebP through a picture element with a JPG fallback source if any of your traffic comes from very old clients.

Hero image failing a Core Web Vitals check

If LCP is being driven by one large photograph, converting that single file is often worth more than optimising the rest of the page. Resize it to its actual display width first, then convert; the two savings compound.

Check the image before download

This is a lossy-to-lossy conversion, so compression artifacts already baked into the JPG are treated as image detail and re-encoded. The result cannot be better than the JPG you started from. Convert from the original camera file when you still have it.
The saving is not guaranteed. A JPG that was already compressed hard, or a small thumbnail, can convert to a WebP of similar or slightly larger size. The displayed byte counts tell you which case you are in.
Screenshots, charts, and images containing small text are the weak case for lossy WebP. Sharp edges attract ringing artifacts. Those images belong in PNG or lossless WebP instead.
An embedded ICC colour profile is not preserved. For photographs destined for print or for brand colour matching, check the output before committing to it.
Some older desktop software and a few upload portals still reject WebP by file type. WebP is a delivery format for the web, not a universal interchange format.

Questions about JPG to WebP

How much smaller will my file be?

For a typical photograph, expect roughly 20 to 35 percent. The figure depends heavily on how aggressively the source JPG was compressed, so the page shows you both byte counts rather than quoting an average.

Does converting to WebP lose quality?

Slightly, because both formats are lossy. At the quality level used here the difference is not visible at normal viewing size on photographic content, but it is a genuine second generation of loss.

Should I keep the original JPG?

Yes. Treat the WebP as a delivery copy. If you later need a different size or format, re-derive it from the JPG rather than from the WebP.

Will every browser display the result?

Every browser released in the last several years decodes WebP. If you must support genuinely ancient clients, serve both files through a picture element and let the browser choose.

Is my photo sent anywhere?

No. Decode and encode both run in your browser through canvas APIs. The download link points at a blob held in the page, and it stops existing when you close the tab.

JPG to WebP