JPG to WebP Converter
Convert JPG and JPEG photos to WebP in your browser - typically 25 to 35% smaller, in batches, nothing uploaded.
How to use it
- Drop your JPG or JPEG files onto the box, or click to choose several.
- Set the quality - 80% is a good balance for photos.
- Download each WebP and check the size saved.
- Replace the JPGs on your pages and update the references.
What it does, and what it does not
It does: convert JPG and JPEG photos to WebP in your browser at a quality you choose, and show the saving on each file. It handles batches.
It does not: upload your photos or increase quality beyond the original - WebP makes the same image smaller, it cannot add detail that was not there.
Reference
JPEG has been the default for web photographs for decades, but it is showing its age. WebP, its modern replacement, typically produces a photo 25 to 35 per cent smaller than a JPEG of equivalent quality. On an image-heavy page that adds up to a real difference in load time, and load time feeds Core Web Vitals, which Google treats as a ranking signal - so converting your photos is a direct, low-effort performance win.
Both JPEG and WebP are lossy formats for photos: they discard detail the eye is least likely to miss. The gain is that WebP is simply more efficient at it, so at the same visual quality the file is smaller, or at the same file size the image looks better. This tool re-encodes your JPEGs to WebP through the browser's canvas at the quality you set. Around 80 per cent is the usual sweet spot for photographs - high enough that the result is hard to tell from the original, low enough to capture most of the saving. Push higher for hero images where detail matters, lower for thumbnails. Because it all runs locally, your photos are never uploaded, which matters for client shoots and unreleased product images.
WebP is supported across every current mainstream browser, so for most sites you can serve it directly. If you need to support very old browsers, use the HTML <picture> element with a WebP source and a JPEG fallback so modern browsers get the small file and older ones still see the photo. Two habits make the win bigger: resize the photo to the largest size it actually displays before converting, since a downscaled image compresses far smaller, and keep width and height attributes on the tag to avoid layout shift. Convert your photo library once and every page that uses those images gets lighter and faster.
Questions
How much smaller is WebP than JPEG?
Typically 25 to 35 per cent smaller at equivalent quality, sometimes more. On image-heavy pages that meaningfully improves load time.
Will I lose quality?
At around 80% quality the result is hard to distinguish from the JPEG while being noticeably smaller. WebP cannot add detail, so it will not look better than the source, just lighter.
Do browsers support WebP?
Yes, all current mainstream browsers. For very old browsers, use a <picture> element with a JPEG fallback.
Are my photos uploaded?
No. Conversion runs in your browser. Your photos never leave your device, which is safe for client and unreleased work.
Should I resize before converting?
Yes. Scale the photo to the largest size it actually displays first - a downscaled image compresses far smaller than a full-resolution one.