Free · private · no upload

How to Convert PNG to WebP

PNG graphics and UI shots are often larger than they need to be on the web. WebP can shrink delivery while still carrying a transparent background in supporting browsers.

✓ Files stay on your device✓ No account or watermark
Your workspaceProcess one image locally
PNG to WebP
01Select→02Adjust→03Download

Choose an image to begin.

Original

Result

Your file stays private. This page processes the image inside your browser. It does not upload the file to our server.

How to use this page

  1. Choose a PNG image.
  2. Set a WebP quality and convert locally.
  3. Check transparency on a contrasting preview and download the WebP.

Worked example: a transparent PNG icon for a marketing site

Convert the PNG to WebP, place it on both a light and a dark background in your layout, and confirm the alpha edge. If the CMS strips alpha, stay on PNG or use a flattened JPG on a matching colour.

What this job is for

Keep the PNG as the design master. Use WebP only as the shipped asset. If a tool cannot open WebP, convert back with the WebP-to-PNG page.

Useful limits

Photographic PNGs become large WebPs if you set quality too high; try a lower quality and compare.

The live tool behind this page is PNG to WebP. It is the same local engine as the rest of Image Cosmos.

Frequently asked questions

Does WebP always keep PNG transparency?

This browser’s encoder is used. Preview the alpha before you delete the PNG.

Should logos live only as WebP?

No. Keep a PNG or vector master.

Upload?

No.

Related Image Cosmos pages

How to Compress an ImageHow to Resize an ImageHow to Crop an ImageHow to Convert JPG to PNGHow to Convert PNG to JPGPNG to WebP

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