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PNG to WebP

Swap heavy PNGs on your site for light WebPs that stay transparent. Converted in the browser.

Drop the PNGs for your site here

  • Files never leave your device
  • Unlimited · No signup

PNG to WebP in 3 steps

  1. Add the PNG graphics you plan to put on your site.
  2. Press "Convert to WebP"; transparent areas stay as they are.
  3. Download the WebP files (a ZIP if there are several) and upload them in place of the PNGs.

Why ConvertKoala?

  • Alpha channel survives

    Transparent logos and product cut-outs keep their see-through edges, which a JPG could never do.

  • Lighter pages, better scores

    Smaller images help your Largest Contentful Paint and the image warnings in PageSpeed Insights.

  • Ready for your CMS

    WordPress (5.8 and later), Shopify, Wix and most modern site builders accept WebP uploads directly.

  • Client files stay confidential

    Unreleased designs and client assets are converted locally and never pass through our servers.

Frequently asked questions

How much smaller will my images get?

It depends on the image. Photos and gradients saved as PNG often shrink a lot; simple flat logos that PNG already compresses well may shrink only a little. Compare both sizes before replacing anything.

Is the WebP lossless?

No, it is saved at about 92% quality, which is visually very close to the PNG but not bit-identical. That trade is what makes the file smaller. Keep your original PNGs as masters.

Will the transparent background stay?

Yes. WebP supports transparency, so logos and cut-outs keep their see-through areas exactly where they were.

Why did I get a PNG instead of a WebP?

You’re probably using Safari. It displays WebP fine but can’t create WebP files, so the tool hands back a PNG rather than nothing. Open this page in Chrome, Edge or Firefox to get WebP output.

Do all browsers show WebP?

Every current browser does, including Safari since 2020. For a public website, WebP is a safe default today.

Can I convert on my phone?

Yes, Chrome on Android produces WebP. On iPhone and iPad every browser uses Safari’s engine underneath, so you’ll get PNG there; a computer is the better choice for WebP.

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