How to Convert PNG to WebP
Open the PNG in an image editor or converter that can export WebP, choose an appropriate quality setting, and save a new file. Preserve transparency when the image needs it. Inspect the exported image and its byte size before replacing the source; changing the filename extension is not conversion.
Decide what the conversion should preserve
Check the image's dimensions, transparent areas and fine detail. A product cutout needs its transparent outline; a screenshot needs readable text. If dimensions already match the destination, keep them constant during the format comparison so you can tell which changes come from encoding.
A smaller file is useful only if it still serves its purpose. A lossy WebP quality setting can alter subtle color detail around text and outlines. Keep the original PNG as an editing source and do not overwrite it until the new asset has been accepted.
Convert and inspect in four steps
1. Confirm the destination accepts WebP and open the original PNG in a WebP-capable exporter.
2. Choose a quality setting and export a new .webp file. Retain transparent pixels rather than flattening the image to an opaque background.
3. View the result at the intended display size. Also inspect fine edges at zoom, including on light and dark backgrounds when transparency matters.
4. Compare actual output bytes, open the file in the destination, and retain the PNG if the tradeoff is unsuitable.
Example: a transparent interface icon
Take a 512 by 512 PNG icon with a transparent surround. Convert it at the same dimensions, then place both versions on the backgrounds used by your interface. Look for colored fringes, softened text and lost thin strokes. A lower-quality output may save bytes while failing this visual check; raise quality or keep PNG rather than accepting a numerical size reduction alone.
Input: icon.png, 512 × 512, transparent
Output: icon.webp, 512 × 512
Check: light background, dark background, thin lines
Accept only after checking file size and visible detailLimitations and follow-up choices
There is no guaranteed size reduction. Browser encoders and source content affect the result. This workflow concerns still images; do not assume an animated source will remain animated through a canvas export. If another editor requires PNG, converting back creates a compatible file but does not restore detail lost in a lossy step.
Follow along in Flekify
Open PNG to WebP to adjust quality and download a local result. For size targets or dimensions, follow with Image Compressor or Image Resizer only after checking the first export.