Strip Alpha Channel

Remove the alpha (transparency) channel from images by compositing them onto a solid background color. This flattens transparent PNGs, WebPs, or other alpha-supporting formats into fully opaque images without transparency data.

The flattening process composites your image over a background color you specify—white, black, brand colors, or any custom RGB value. Semi-transparent pixels blend with the background according to their alpha values, producing the appearance the image would have when displayed over that color. The resulting image contains no alpha channel, reducing file size and ensuring compatibility with formats and platforms that don't support transparency.

Designers preparing PNG graphics for JPG conversion (which doesn't support alpha) flatten transparency before format change. Email marketers ensuring images display correctly in email clients that handle transparency inconsistently flatten to safe backgrounds. Print production teams preparing images for CMYK conversion remove alpha channels that print workflows cannot process. Developers optimizing image file sizes eliminate unused alpha channel data. Anyone whose transparent images display incorrectly—showing unexpected backgrounds or black areas where transparency existed—resolves the issue by flattening to an appropriate background color.