Shrink heavy transparent PNG cutouts and UI assets by up to 70% by converting them to alpha-enabled WebP files.

Why transparent PNGs are so heavy

A 32-bit RGBA PNG stores four full bytes per pixel and compresses them with a general-purpose lossless dictionary algorithm. Export a complex product cutout with soft shadows and the file easily passes 1 MB.

Converting that PNG to WebP keeps the identical 8-bit alpha mask while applying perceptual compression to the RGB channels, which cuts the weight dramatically.

Recommended free tool

Open the free PNG to WebP converter

Drop any PNG file to convert it to WebP while preserving full transparency.

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Step-by-step browser workflow

Converting a file takes under ten seconds:

  • 1. Open the PNG to WebP converter and drop your .png graphic into the upload zone.
  • 2. Check the checkerboard preview to confirm the transparent background survived.
  • 3. Set quality to 85% for photographic cutouts or 92% for crisp UI typography.
  • 4. Download the WebP file and reference it in your img or picture element.