PNG to WebP converter — free online tool

Convert PNG to WebP to cut page weight while keeping transparency. Written as lossy WebP at quality 92 with the alpha channel intact.

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Choose one output format for every selected image.

What to know

PNG to WebP is a way to keep transparent graphics while shedding weight. Where a PNG stores every pixel losslessly, WebP uses a newer lossy method here, and a screenshot or product cut-out that was a heavy PNG typically drops to a fraction of its size.

The alpha channel comes along, so a logo or sticker with a soft transparent edge stays transparent in the WebP, unlike a JPG conversion that would paint it white. The output is lossy WebP at quality 92. That setting is high enough that photographs and gradients look clean, but it is not pixel-identical to the source: if you need an exact copy, keep the PNG or compress the PNG losslessly with the PNG compressor.

Be careful with images that have text, thin lines or flat color bands. Lossy encoding can leave faint fuzz around letters and tiny shifts in solid colors. Check the result at 100% before replacing UI art or pixel art with it. Photographs and illustrations with soft shading are the best candidates.

WebP is understood by current browsers, though some design tools, email clients and print services may not open it, so keep the PNG as your master. Up to 12 files and 48 MB are converted per batch in your browser, and sizes in pixels do not change.

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How to use PNG to WebP converter — free online tool
  1. Drop your PNG files into the page; the output format is locked to WebP.
  2. Run the conversion and compare each size with the source PNG.
  3. Download the WebP files and view them over a colored background to confirm that transparency survived.
  4. Keep the original PNG as the master, and publish the WebP to your site.

Quick answers

Does PNG to WebP keep the transparent background?

Yes. The alpha channel is encoded into the WebP, so transparent and semi-transparent pixels remain as they were.

Is the WebP an exact copy of my PNG?

No. It is encoded as lossy WebP at quality 92, so tiny differences can exist. Use the PNG compressor if you need a lossless result.

How much smaller will the WebP be?

Photographic or screenshot PNGs often shrink dramatically, while small flat icons may change little. The result list shows each size next to the source.

Which images should I leave as PNG?

Pixel art, images with small crisp text, and masters you plan to edit again. Those benefit from the exactness of PNG.