How to convert PNG to WebP

Convert a PNG image in three steps

The preset accepts PNG input and fixes the output to WebP. A transparent sample can be useful for checking the result in your destination app.

1. 1

   Choose up to five PNG files, each within 15 MiB and 40 megapixels.

2. 2

   Set the WebP quality and process the images. The pixel dimensions stay the same.

3. 3

   Download the result and inspect it against both light and dark backgrounds if transparency matters.

Check transparency around edges

WebP supports alpha transparency. PixMinto keeps the transparent canvas when exporting PNG to WebP instead of adding a white background. Inspect shadows, semi-transparent edges and small lettering after conversion.

If the destination displays a solid background, check whether the app supports transparency for that workflow. The appearance in one viewer is not proof that every destination will handle the file the same way.

Understand the quality setting

The WebP format has both lossless and lossy modes, but PixMinto’s browser canvas export uses a quality value. Do not treat this tool as a guaranteed lossless PNG-to-WebP converter.

For a logo, compare small text and flat-color edges. For a detailed graphic, compare textures and gradients. Use the original PNG when exact source pixels are required.

Compare actual file sizes

A WebP copy may be smaller, but no fixed saving applies to every file. A tiny optimized PNG can already be compact. Explicit conversion returns the chosen format even when the result is larger.

If the graphic has far more pixels than needed, use the resize tool separately. Keep the original PNG so you can make another export without reusing a reduced or lossy copy.