Frequently asked questions
Are my images uploaded to a server?
No. Image analysis runs on your device with the HTML canvas API — files never leave your computer, and the tools keep working offline once the page is loaded.
What does the white-background check actually do?
It samples the four corners (plus two edge midpoints) of your image and verifies each reads near-white. It is a fast screen, not a pixel-perfect audit: a white-background image with a colored frame edge will still be caught.
Why does my search-terms field run out of space before 250 characters?
Because the limit is 250 bytes and multi-byte characters (accents, symbols) cost two or three bytes each. The counter shows both numbers plus every duplicated word you can delete for free space.
What happens if my title is over 200 characters?
Many categories enforce caps around 200 characters, and mobile truncates far earlier. Long titles risk suppression in strict categories and read as spam. The analyzer flags length, ALL-CAPS words and duplicates.
Are the A+ slot sizes official?
They are the widely-published standard module dimensions (image header 970×600, single side image 300×400, comparison chart 150×300, and so on). Amazon occasionally revises specs — confirm in Seller Central before final exports.
Do you check my listing against Amazon automatically?
No — this site never connects to Seller Central or any Amazon account. Checks run locally against published rules; you stay in control of your credentials and data.