What this tool checks
The browser decodes your selected JPG, PNG, WebP or GIF and measures its intrinsic width/height and file size. It raises resolution and unusually narrow/wide image recommendations.
Worked example
An image measuring 400 × 400 pixels receives a low-resolution warning and a recommendation to use a larger source where appropriate.
Assumptions and limitations
No aesthetic or AI visual evaluation. We cannot confirm if the product occupies sufficient image area, has a distracting background, includes prohibited promotional text or satisfies every marketplace category rule. 15 MB file limit.
Reference: Official documentation. Review source updates before relying on rules.