Is transparency preserved?

WebP output can retain alpha when encoded via canvas in supporting browsers.

Why might conversion be unavailable?

Some browsers cannot encode WebP from canvas. The page states this honestly before you convert.

25 MB file size and 8192 px width or height.

UI screenshots and photos with many colors often compress smaller in WebP. Simple flat icons may already be tiny as PNG — compare both downloads.

Only the first frame decoded to canvas is encoded. Animated PNG and GIF sources become a single static WebP image.

Turn UI assets and screenshots from PNG into WebP using client-side encoding. Alpha is preserved when the browser supports it.

PNG image

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Quality (92%)

WebP output

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: WebP output can retain alpha when encoded via canvas in supporting browsers.
: Some browsers cannot encode WebP from canvas. The page states this honestly before you convert.
: 25 MB file size and 8192 px width or height.
: UI screenshots and photos with many colors often compress smaller in WebP. Simple flat icons may already be tiny as PNG — compare both downloads.
: Only the first frame decoded to canvas is encoded. Animated PNG and GIF sources become a single static WebP image.