Create an SVG with viewBox 0 0 64 64, one violet circle and one cyan path using presentation attributes. Do not add CSS or an image. Choose width 512, keep aspect ratio and leave the background transparent.

Expected evidence

The source ratio is 64 × 64 from viewBox. The planned and parsed PNG dimensions are 512 × 512, the background label is Transparent and the filename ends in -512x512.png. The checkerboard remains outside the Blob.

Inspect alpha on two backgrounds

Open the PNG over both a light and dark surface. Confirm the empty corners show each destination and that semi-transparent edges do not carry an unwanted matte colour. If the intended destination always has one colour, compare a solid export too.

Reproduce and inspect

Create the stated SVG with presentation attributes, choose the example dimensions and background, then convert. Confirm the visible dimensions and downloaded PNG IHDR agree. Encoded byte counts can vary by browser, but the width, height, alpha choice and filename must match the example contract.