Free PNG to WebP Converter

Turn heavy PNG files into lightweight WebP images for your website. Everything runs in your browser, so nothing is uploaded.

  • Free
  • No signup
  • Files stay on your device

Need a different format? Try our universal file converter for images, video, audio, PDF and data files.

How to use the PNG to WebP Converter

PNG is lossless, which makes it a poor fit for photos and large graphics on the web — the files are simply too heavy. WebP encodes the same image at a fraction of the size, keeps transparency, and is supported by every current browser. Converting your largest PNGs to WebP is one of the quickest ways to speed up a page and improve its Largest Contentful Paint.

  1. 1Drop your .png file onto the converter or click to choose it.
  2. 2Leave the target format on WebP.
  3. 3Click convert — the image is encoded on your device at 90% quality.
  4. 4Download the WebP and replace the PNG on your site.

Frequently asked questions

How much smaller is WebP than PNG?

It depends on the image. Photos and detailed graphics saved as PNG often shrink by well over half when converted to lossy WebP. Simple flat graphics with few colours gain less, because PNG already compresses those well.

Does WebP support transparency?

Yes. WebP has an alpha channel, so transparent PNGs stay transparent after conversion.

Is the conversion lossless?

No. This converter writes lossy WebP at 90% quality, which is visually very close to the original for most images. If you need a pixel-exact copy, keep the PNG.

Do all browsers support WebP?

Every current version of Chrome, Edge, Firefox, and Safari displays WebP. Only very old browsers, such as Internet Explorer, cannot.

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