Convert JPG to WebP — Free, No Signup
Convert JPG to WebP and cut 25 to 35 percent off the file at matched visual quality. The usual reason is page speed — WebP is the format most site audits will tell you to serve.
How to do it
- Drop your JPG onto the upload box.
- Choose WebP as the output format.
- Set quality to about 80 for a good size-to-quality trade.
- Download the WebP for your web pages.
Why WebP beats JPEG on size
WebP borrows its compression from a video codec, which brings tools JPEG never had. It predicts blocks from their neighbours before encoding the difference, uses a more efficient entropy coder, and handles smooth gradients without the banding JPEG produces. In practice that means 25 to 35 percent smaller files at quality indistinguishable from the JPEG, and the gap widens on images with large smooth areas — skies, studio backdrops, product shots on white. On busy, noisy images the advantage narrows but does not disappear.
Page speed is the usual motivation
Images are typically the largest thing a page downloads, so a third off every photo is a meaningful cut to total page weight and to Largest Contentful Paint. Site audits from Lighthouse and PageSpeed Insights flag this directly with a serve images in next-gen formats recommendation, and WebP is what they mean. If you are converting a whole gallery, be aware the gain compounds: twenty images at 400 KB becoming twenty at 270 KB removes 2.6 MB from the page.
You are re-encoding an already-lossy file
This matters and is worth being deliberate about. Your JPEG has already discarded detail, and encoding to WebP discards a little more on top. At quality 90 that second pass is invisible in normal viewing. At quality 70 you may start to see softness in areas the JPEG had already worked hard on. If you have the original camera file, converting that straight to WebP gives a better result than converting the JPEG export — one generation of loss instead of two.
Where WebP still gets refused
Browsers are fine. The friction is elsewhere: print services, some email clients, older desktop software, and upload forms with fixed extension lists. If you are serving images on the web, use WebP freely. If the file is going to a person who will open it in something you do not control, JPEG remains the safer choice. There is no shame in keeping both — serve WebP on the site and hand out JPEG when someone needs a file.
Settings and limits
Quality defaults to 90 and is clamped between 10 and 100. Pixel dimensions are unchanged. Input is capped at 5 MB. The conversion runs in your browser using the canvas encoder, so nothing is uploaded and processing time depends only on your own device.
Frequently asked questions
How much smaller is WebP than JPEG?
Typically 25 to 35 percent at matched visual quality, with the largest gains on images containing smooth gradients and flat backgrounds.
Will converting an existing JPG lose quality?
A little. The JPEG already discarded detail and WebP discards a little more. At quality 90 the second pass is invisible in normal viewing.
Is WebP good for SEO?
Indirectly. Smaller images improve page speed and Largest Contentful Paint, which are ranking inputs. The format itself is not a ranking factor.
Do all browsers support WebP?
Yes, every current browser. Support gaps are outside the browser, in older desktop software and some upload forms.
Should I convert the original or the JPEG export?
The original if you have it. Converting the export stacks two generations of lossy encoding instead of one.
What quality setting should I use?
90 for anything important, 80 for general web images. Below 70 the double encode starts to show as softness.