You are re-compressing something already compressed. Keep the quality dial high — 85 percent or above — so the second pass is not fighting the first, and the size win usually survives anyway.
JPEG to WebP converter
The same photo, roughly a third smaller, with no difference you can see at normal viewing sizes.
- Free, no signup
- Runs in your browser
- Nothing uploaded
- The source is already lossy, so this is a second compression pass. Keep the quality high to avoid stacking artefacts.
Convert to
Why this conversion
When JPEG to WebP is the right move
WebP's lossy mode is simply a newer, better compressor than JPEG's. At matched visual quality it typically lands 25 to 35 percent smaller on photographic content, which on an image-heavy page is the difference between a fast load and a slow one. It also handles smooth gradients — skies, studio backdrops, soft shadows — with less banding than JPEG manages at the same size.
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There is one honest caveat that applies to this direction specifically. A JPEG has already been through a lossy encoder once, and converting it to WebP puts it through a second one. The artefacts from the first pass become part of the picture the second pass is trying to preserve. If you still have the original PNG, RAW or camera export, convert from that instead and you will get a smaller, cleaner file.
Reach for it when
- You are serving photographs on the web and page weight matters.
- The image has broad gradients that JPEG is banding.
- You have no access to a pre-JPEG original, and a second lossy pass is an acceptable price.
The trade-off
What you gain and lose going JPEG to WebP
Expect roughly a quarter to a third off a typical photograph. If the JPEG was already saved at low quality, there is less redundancy left to squeeze and the saving shrinks accordingly.
Email clients remain the one place WebP is unreliable. If the same image goes into a newsletter as well as on a page, keep the JPEG for the email and serve the WebP on the web.
How it works
Converting JPEG to WebP, step by step
1Choose your JPEG file
Browse or drop it onto the panel. Up to 25 MB. The file is decoded by your browser and is never uploaded anywhere.
2WebP is already selected
The target is preset to WebP for this conversion. Only formats your browser can genuinely encode are offered, so nothing hands you a renamed PNG.
3Set the quality
WebP is lossy here. Around 80 percent is the usual sweet spot — most of the size saving, none of the visible mush.
4Compare, then download
Original size, converted size and the percentage difference are all shown before you commit — including the cases where converting makes the file bigger.
JPEG to WebP questions
Pick a question to see the answer.
Yes, a little — it is a second lossy encode. Keeping the quality dial at 85 percent or above makes that pass close to invisible while still delivering most of the size saving. Converting from a pre-JPEG original is always better when you have one.
For a typical photograph, 25 to 35 percent at comparable visual quality. Low-quality JPEGs save less, because much of the redundancy WebP would exploit has already been removed.
Not if the image is used anywhere other than a web page. Email clients and a fair amount of desktop and print software still refuse WebP, so the JPEG remains the safest thing to attach or hand over.
Related conversions
Other formats, same converter
PNG to WebP
Cut a screenshot or logo down to a fraction of its size without losing the alpha channel.
WebP to JPEGConvert a WebP into the format almost nothing rejects.
JPEG to PNGStop the generation loss before you start editing a JPEG.
Every format in one toolThe general image converter, with all the formats your browser can write and the same size comparison before you download.
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