Check a product photo before you upload it

Amazon, eBay, and Etsy reject photos for reasons they never spell out. Drop your images in and see the exact rule each one breaks — then fix it in one click. Everything runs in your browser; your images never leave your device.

Marketplace

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Why product photos get rejected

Marketplaces run automated image checks. The most common silent failures are a background that looks white but isn't exactly 255,255,255, an image that's too small for zoom, a product that doesn't fill enough of the frame, or a watermark, logo, or border on the main photo. ListingLint measures each of these directly from the pixels, so you find out before the marketplace does.

Amazon main-image rules

Background must be pure white — RGB 255,255,255.
Product should fill at least 85% of the frame.
Longest side ≥ 1000px (1600px+ recommended for zoom).
No text, logos, watermarks, or borders on the main image.

eBay photo rules

Longest side ≥ 500px; 1600px+ recommended for zoom.
A plain, light background is recommended.
No added borders, text, or watermarks.

Etsy photo tips

Aim for 2000px+ on the shortest side.
Use a square (1:1) image — thumbnails are cropped square.
No white-background requirement; lifestyle photos are encouraged.

Frequently asked questions

Do my images get uploaded anywhere?

No. All analysis and every fix happen inside your browser using the Canvas API. Your photos never touch a server, which is why it's fast and private.

Why does Amazon reject my white background?

Amazon requires the background to be exactly RGB 255,255,255. A photo shot in a lightbox is usually 248–253 — invisible to your eye, but the algorithm flags it. The “Snap background to white” button pushes near-white pixels to pure white.

How accurate are the checks?

Size, background colour, and product-fill are measured exactly from the pixels. Checks labelled “estimate” (possible text/logo, edge shadow) are heuristics — treat them as a prompt to look closely, not a verdict.

Is it really free?

Yes. The tool is ad-supported and free to use with no account.