Search vs feed
Product.image in JSON-LD should be an absolute URL to a sharp, well-lit photo. WebP is fine for Google Search. Google Merchant Center historically preferred JPEG — check the current spec for your feed.
Why it matters
- Rich results need valid images.
- A 50 px WebP swatch is a bad Product.image.
- Theme and feed often point at different files anyway.
How to do it
- Convert PDP masters to WebP ~1600 px.
- Point schema at that URL.
- If Merchant rejects WebP, generate a JPEG sibling for the feed only.
Settings that work
Schema images should be at least 100 px on the shortest side; larger is better. Do not use logos as Product.image.