Make a PNG far lighter for the web while keeping its transparency and its sharp edges.
Swap: WebP to PNGWebP keeps everything people like about PNG — transparency, sharp edges — and then takes far less room to store it.
Two megabytes of PNG screenshots on a product page is two megabytes every visitor downloads, on a phone, on mobile data. The same images as WebP routinely land 30–70% smaller at a quality no one can tell apart, and image weight is usually the largest single item in a page's load time.
Unlike JPG, WebP has a real alpha channel, so a logo, an icon with soft edges or a cut-out product shot keeps its transparent background exactly as it was. This is the conversion to use when the picture sits on a coloured or changing background and must not become a white rectangle.
Chrome, Firefox, Safari, Edge and every browser on a modern phone have supported WebP for years, and so do WordPress, Shopify and the major CMSs. For images that only ever appear on a page, that covers the audience; for a file that has to open in a desktop editor or an upload form, check first.
Mostly weight. The pixels you can see barely move, as long as the quality is set sensibly.
PNG was lossless; WebP written here is lossy unless you push quality to 100. For photographs 75–85 is invisible on screen, while graphics with small text or thin lines want 90 or more, since that is where compression artefacts show up first. Check the preview at full size when in doubt.
Fully and partly transparent pixels are carried over, so drop shadows stay soft and anti-aliased edges keep their smoothness. The Background field can be left on "keep transparency"; fill it in only when you deliberately want the cut-out flattened onto white or black.
A photograph is full of fine variation, which is where WebP earns its keep. A flat icon or a two-colour chart has little to compress, so the saving may be modest — and a very small PNG can even come out slightly heavier. Compare the two weights in the result before replacing anything.
An animated PNG becomes a still WebP of its first frame; a plain PNG is unaffected. What does carry over is orientation: an EXIF rotation tag is applied to the pixels, so the result is upright, and the remaining metadata is dropped rather than copied into the WebP.
Three steps, and the transparent version stays transparent.
Drag it onto the box, click to choose, or paste it with Ctrl+V (Cmd+V on a Mac). One file per run, up to 25 MB.
82 is a good start for photos and 90 for screenshots and graphics. Set the width to the largest size the image is displayed at — there is no point shipping 2400 px to a slot 800 px wide, and the file gets dramatically lighter.
The result line shows both weights and the percentage saved, so you can lower the quality once and try again if the gain is not enough. One click saves the .webp; keep the PNG as your master copy.
The best image on a page is the one that is small and sharp.
For a retina screen, an image twice its display width is enough: a 400 px thumbnail becomes an 800 px file. Anything beyond that is downloaded and thrown away by the browser. That single decision usually saves more than any quality setting.
WebP here is lossy, so re-saving it repeatedly drifts the same way a JPG does. Archive the PNG, publish the WebP, and go back to the WebP to PNG converter if a copy without compression is needed again.
Browser: WebP, every time. Old desktop software, a print shop or a form that inspects the file type: use PNG to JPG instead, or keep the PNG. When the picture only has to be lighter and compatibility does not matter, compressing the image can shave more off with one step.
Yes. There is no account, no payment, no watermark and no limit on how many images you convert. Only a short rate limit applies, so one visitor cannot occupy the server for everybody else.
Yes. WebP stores an alpha channel just as PNG does, so transparent and semi-transparent pixels are preserved — soft shadows, feathered edges and cut-out logos all survive. Leave the Background field on "keep transparency" and nothing is flattened.
On photographs and screenshots with lots of tone, typically 30–70% smaller at a quality that looks identical on screen. Flat graphics with few colours save less, and a tiny PNG can even get slightly heavier, so compare the two weights shown in the result before replacing the original.
An animation is reduced to its first frame, because the WebP written here is a still image. Rotation stored as an EXIF tag is applied to the pixels on the way through, so the result is upright and its width and height match; the rest of the metadata is not copied over.
Up to 25 MB per file, with a limit of 50 megapixels per image. Files are processed on our server and not stored: only the finished WebP is sent back, so nothing is kept afterwards.
