Convert PNG to WebP.

No. The image is decoded and re-encoded in this page by the browser's canvas, and the tool makes no request with it.

Lossy WebP is good at photographs and weaker at flat colour. Screenshots, logos and line art compress well as PNG already, so the WebP can be bigger, and the tool shows the increase so you can keep the original. Quality 100 is worth a try, since some browsers write lossless WebP at that setting.

It works in any browser that can write WebP from a canvas. The page tests for that when it loads. If the test fails, the converter is switched off with a message instead of producing a file that is named .webp but is not one.

The embedded ICC profile is not carried into the WebP, and neither is most metadata, such as EXIF. A colour-managed image can therefore look different. Use a desktop encoder when the profile has to stay.

Yes. Converting needs no account and costs nothing, and there is no limit on how many images you convert.

PNG, JPG and JPEG, up to 10 MB each. The picker offers only those types, and a larger file is refused with a message giving its size.

It tells the encoder how much detail to keep. Lower numbers give smaller files with more visible artefacts, and higher numbers keep more detail. The converter starts at 82 and runs again when you let go of the slider.

No. The WebP has the same width and height as the original, and the converter shows both numbers after it finishes.

The original name with .webp in place of its extension, so cover-photo.png downloads as cover-photo.webp.

No. It converts one image at a time. Choose the next one once the first has downloaded.

No. The image and the WebP exist only in this page while it is open, and nothing is saved in the browser.

Start at the default of 82 and look at the preview. If the picture still looks right, try a lower number for a smaller file, and if you can see blocks or smearing, go higher. The sizes update after each change.

Yes. The converted image shows under the download button, together with its width and height in pixels.

It depends on the picture, so the converter measures it instead of estimating. Photographs often shrink by a large share, and flat-colour images may not shrink at all. The result shows the saving in bytes and as a percentage.

It is the saving as a share of the original size. A 1.2 MB PNG that becomes a 317.5 KB WebP has saved 74%.

Lossy compression drops detail the eye is unlikely to miss, in exchange for a smaller file. Lossless compression, which PNG uses, keeps every pixel exactly.

Current browsers display WebP images. Some older software does not, so keep the original if the file is going somewhere that only takes PNG or JPG.

The canvas is the browser's built-in way to draw an image and write it out in another format. Using it means no extra code is downloaded and the image never leaves the page.

No. The WebP is a new file, and your PNG or JPG stays exactly as it was.

Yes, as long as the file is 10 MB or smaller. A larger photo is refused with its size, and saving it as a smaller JPG first brings it under the limit.

There is no lossless switch. Quality 100 is the closest setting, and some browsers write lossless WebP there while others keep it lossy.

No. It is a setting for the encoder, not a promise about size or detail. Quality 82 keeps a lot of detail, but the file size it gives depends on the picture.

Not by pasting. Save it as a PNG or JPG first, then choose the file.

Usually a moment. A large photo takes longer, since it is decoded and encoded again in full, and the page shows Converting… while it works.

Yes. A JPG or JPEG converts the same way as a PNG, and the result compares the WebP with the JPG's own size.