Free Amazon Buy Box Checker
See who owns the Buy Box on any ASIN, in any city, across the US, UK, Canada, and Ireland. No login, no Amazon account, about 15 seconds.
The Buy Box is decided per location, not per listing
Amazon picks the Featured Offer partly on how fast it can get the item to the shopper. Delivery speed depends on which fulfillment centre holds stock nearest that shopper. So the same listing, at the same price, on the same day, can show your offer in one city and a competitor's in another.
44.6%
of multi-location ASINs we monitor split the Buy Box by ZIP code: at least one location shows a different winner than another, at the same moment. Measured across the products tracked in Buy Box Checker.
30%
of products have at least one ZIP code where the Buy Box is lost or suppressed outright. A national-level check reports a single status and never surfaces it.
That is the gap this tool exists to show you. A single check tells you almost nothing. Checking several cities at once tells you whether your Buy Box is actually stable, or only stable where you happened to look.
How to check the Buy Box by hand
You do not need any tool for a single check, including this one. Here is the manual method, in full.
- 1
Open the product page on Amazon
Go to the listing you want to check, signed out or in a private window so your own account history does not colour the result.
- 2
Set the delivery location
Click the delivery address at the top left, choose to enter a ZIP or postcode, and enter the location you want to test.
- 3
Read the Sold by and Ships from lines
Under the Add to Cart button, Amazon names the seller holding the Featured Offer. If that is not you, you do not have the Buy Box in that location.
- 4
Repeat for every location that matters
Change the delivery location and read the seller again. The winner can differ city to city, so one location tells you almost nothing on its own.
The method is sound. It just does not scale. Four locations on one ASIN is about five minutes of clicking, and it is a snapshot that goes stale the moment a competitor changes price or runs out of stock. Ten ASINs across ten cities, every day, is not a thing a person does.
Watch it work
A short walkthrough of Buy Box suppression, ship time, and Buy Box percentage by ZIP code.
What this free check does, and what it does not
The tool above is a snapshot. Useful for a spot check, useless for catching the loss that happens next Tuesday at 3am.
| This free check | Continuous monitoring | |
|---|---|---|
| Locations checked | Up to 5 cities you pick | Every location you choose, no cap on the paid plans |
| How often | Once, when you run it | Every day, automatically |
| Alerts | None | The moment the Buy Box flips, by email, Slack, Teams, or webhook |
| History | None | 30 days of ownership, price, and rank trends |
| Listing changes | Not tracked | Title, bullets, images, and brand, with before and after |
| Account needed | No | Yes, and the free plan covers 20 checks |
Buy Box questions, answered
How do I know if I have the Buy Box on Amazon?
Open your listing and read the Sold by line under the Add to Cart button. If it names your seller account, you hold the Featured Offer for that delivery location. Because the winner is decided per location, you have to repeat the check for each ZIP or postcode you care about, which is what this tool automates.
Can I check the Buy Box without a seller account?
Yes. This tool reads the public product page, exactly as a shopper would see it, so it needs no Seller Central connection, no API keys, and no login of any kind.
Why does the Buy Box winner change by ZIP code?
Amazon weighs delivery speed to the shopper's address, and delivery speed depends on which fulfillment centre holds stock nearest that address. A seller with stock near Chicago can win there and lose in Miami on the very same listing, at the very same price.
Is this really free?
Yes, and it needs no account. One check per day per visitor, across up to five cities. There is a sample report you can view without spending a check.
Does this work for amazon.co.uk, amazon.ca, and amazon.ie?
Yes. Pick your country, or just paste a product link from that marketplace and the country switches on its own. Results come back in that marketplace's own currency and postcodes.
What does a suppressed Buy Box mean?
It means Amazon showed no Featured Offer at all for that location, so there is no Add to Cart button and shoppers have to go through See All Buying Options. Nobody wins the Buy Box, and conversion falls sharply.