Convert Image to WebP

Why WebP, and how much it actually saves

WebP produces meaningfully smaller files than JPG or PNG at the same visual quality — typically a quarter to a third smaller than JPG, and often dramatically smaller than PNG for the same image. On a web page, that is the single easiest performance win available: images are usually most of a page's weight, and page speed is something Google measures.

It also keeps transparency, which JPG cannot, so a logo or a cut-out product shot can move from PNG to WebP without losing its transparent background and without the file size PNG demands.

When WebP is the wrong choice

Every browser in current use displays WebP, so for a website it is safe. Outside the browser it is patchier, and this is worth knowing before you convert a folder of images.

Email is the main trap. Several desktop mail clients still will not display WebP, so an image embedded in a newsletter can arrive as a broken box for part of your list. Use JPG or PNG in email. Older desktop software — established design tools, office suites a few versions back, some photo viewers — may refuse to open a WebP at all. Some CMS and marketplace uploaders also reject the format outright, as do most print workflows, which expect JPEG or TIFF.

The short rule: WebP for your website, JPG or PNG for anything you send to a person or hand to another system.

Where to set the quality

The slider runs from 10 to 100 and starts at 92, which is high on purpose. If your source is a JPG it has already been compressed once, and converting re-encodes it — so a low WebP quality stacks a second round of loss on top of the first, and the artefacts compound visibly. Starting at 92 keeps that in check.

For photographs on a web page, somewhere between 80 and 90 is usually indistinguishable from the original at normal viewing size while saving a good deal more. Below about 70 the damage starts to show in skies, skin tones and gradients. Convert one representative image first, look at it at full size, and then run the rest at that setting.

Batches

Add as many images as you need and they convert together at the same quality, downloading as a single ZIP. Each one also gets its own entry with its size, so you can see which images benefited most — usually the largest photographs, while small icons and simple graphics gain far less.

Related tools

Compress Image reduces file size while keeping the original format, which is the better move when the destination cannot take WebP. Resize Image cuts dimensions first — usually a bigger saving than any format change — and Convert Image Format handles the other formats, including converting WebP back to JPG or PNG.