A listing gets suppressed over a background that is 8 levels too warm. Fixing it after the fact costs a week of sales. Fixing it before costs one run of this.
No. Decoding, checking and repairing all happen in the tab. You can open the network panel and watch it stay empty, and the page still works with the Wi-Fi off once loaded.
Does it need an account or a login?
No. You get a licence key, paste it once, and the browser remembers it. Nothing is checked against a server, so it also works on a machine with no internet.
Will this guarantee Amazon accepts my listing?
No, and nobody can promise that. This checks the file against the technical requirements Amazon publishes. Content, category and variation rules are reviewed with a person looking at the whole listing.
What happens when it finds something it cannot fix?
It says so and skips the file instead of shipping a damaged one. A dark lifestyle photo has no separable backdrop; the honest answer is "this needs a manual mask", and that is what the report says.
There are free checkers. Why pay?
Because checking is the easy half, and it is already free in several places. This one also does the work: it replaces the background, crops the border, reframes to 85 % and re-encodes at 2000 px. If you only want a pass/fail list, use a free checker — the free mode here does that too.
Which platforms are supported?
Amazon main images today. The rule set is versioned in the open, and every rule links to the page it came from. Other marketplaces will get their own rule set rather than a guess.
Refunds
Seven days, no questions, no form. Reply to the receipt and the payment is returned; the key is deactivated.