About ListingCheck
ListingCheck is an independent, browser-only checker for Amazon listings. It exists because most listing suppressions are caused by a small, predictable set of words and formatting mistakes — and those are cheap to catch before a listing goes live.
What it does
- Scans a title and five bullets against 63 restricted terms, grouped by reason: medical claims, absolute claims, promotional language, trademarks, and unsubstantiated claims.
- Checks title length against your marketplace limit, ALL CAPS runs, special characters, keyword position, repeated words, and missing size or pack count.
- Handles a CSV of up to a few hundred rows and exports a cleaned version with a per-SKU score.
Everything runs in your browser. There is no account, no upload, and no server storing your data.
Why it exists
Enterprise listing tools cost more than most small sellers spend on software, and a chat model will happily write a title that contains three prohibited claims. The gap is not writing ability — it is rule knowledge. That is the part worth automating, and it is the part this site focuses on.
How the rules are built
The restrictions come from two sources: published marketplace policy, and the recurring patterns behind suppressions that sellers report. Where a rule is category-specific or jurisdiction-specific, the checker applies the stricter reading and tells you why.
Two examples of how this plays out:
- Repeated words. Amazon introduced a limit on repeated words in titles effective 21 January 2025. The checker flags any word used more than twice.
- Search terms. The backend keyword field is measured in bytes, not characters. A Chinese or emoji-heavy list runs out of budget far sooner than 250 characters, so the byte counter exists as a separate page.
What it deliberately does not do
- It does not rewrite your copy. Removing “best” is a rule; writing a selling point is editorial judgment, and a tool should not pretend to do both.
- It does not check images or category attributes. Those are visual and structural; the checklist page covers them in prose instead.
- It is not legal advice. Policies change, and enforcement varies by marketplace and category.
- It does not guarantee reinstatement. Passing the check lowers risk; it does not settle an account-health case.
How the score works
The score starts at 100. Each blocking violation costs 20 points, each review-level warning costs 5. Three blocking violations put a listing in the red — which is the intent: a listing with three prohibited claims is not “mostly fine”.
The score is a heuristic, not a prediction. It tells you how much needs fixing, not how much it will sell.
Data handling
Files you open in the bulk checker are read by your browser and processed in memory. They are not transmitted anywhere. The site loads one analytics script that records page views without cookies and without storing listing content.
Contact
Corrections, false positives, or questions about the rule set: lobinson@outlook.com. A rule that is out of date is worth reporting — it gets fixed in the next update.
Corrections
Marketplace rules change, and this list is maintained by hand. If you find a rule that is out of date or a term that produces a false positive, that is useful — the correction will be folded into the next update of the rule set.