Shopping on Amazon is easy — finding the lowest price for the same product across different countries is not. With marketplaces like amazon.com, amazon.co.uk, amazon.de and amazon.co.jp, prices for the identical item can vary widely based on local demand, taxes, shipping, currency, and which seller happens to hold the BuyBox. The free Amazon Price Comparison Tool does the hunting for you: enter one ASIN and it checks that product's BuyBox price across every major Amazon marketplace, then converts each local price to USD with live exchange rates so you can compare them like for like.
Why compare prices across Amazon regions?
- Amazon pricing isn't universal. A gadget can be cheaper in the US than in Europe, or carry a premium in a market with thin competition.
- Currency hides the real cost. The same local sticker price is worth different amounts in USD as FX moves — you can't compare £ to ¥ by eye.
- Sourcing & arbitrage. Sellers and resellers spot where a product is under- or over-priced across regions.
- Full picture, one search. See the cheapest and most expensive markets at a glance instead of flipping through a dozen tabs.
How the Amazon price comparison tool works
One ASIN, every marketplace
When you provide an ASIN, the tool queries the current BuyBox price for that product across all the major Amazon marketplaces — the US, Canada, Mexico, Brazil, the UK, Germany, France, Italy, Spain, the Netherlands, Sweden, Poland, Japan, Australia, India, the UAE, Singapore and Turkey — in parallel. Each request returns the live price in that marketplace's local currency, along with stock status and who currently holds the BuyBox.
Everything normalized to USD
Comparing £19.99 in the UK to ¥3,200 in Japan and R$149 in Brazil is meaningless without a common unit. The tool fetches live USD exchange rates and converts every local price to USD, then ranks the marketplaces from cheapest to most expensive and shows the price spread as a percentage. The cheapest market is highlighted in green, the most expensive in red — so the answer to "where is this product cheapest right now?" is immediate.
Powered by the Asgard Amazon API
The live data comes from the Asgard Amazon API. Instead of opening 18 browser tabs, the tool sends a live BuyBox request per marketplace and reads back a structured response — price, currency, stock, seller. Because ASINs are region-specific, the same identifier doesn't always exist in every country; when a marketplace has no listing, the tool marks it "Not sold here" rather than hiding it, so you always see complete coverage. The same production API powers this free tool, so the numbers in your browser match what you can pull programmatically.
How to use the free price comparison tool
Accessing the tool
Open the free Amazon Price Comparison Tool. No account, no download — enter your email and an ASIN and it runs in the browser.
Finding your ASIN
An ASIN is Amazon's unique 10-character product identifier, found in the product URL — in amazon.com/dp/B09XY12345, the ASIN is B09XY12345. Paste it in, submit, and the tool compares every marketplace at once.
Reading the results
| Field | What it shows | How to use it |
|---|---|---|
| Local price | The BuyBox price in that marketplace's own currency | What a shopper in that country actually pays. |
| USD price | The local price converted at live FX rates | The only fair way to rank markets against each other. |
| Cheapest / most expensive | The lowest and highest USD prices found | Instantly see the best and worst markets to buy in. |
| Price spread | Percentage gap between cheapest and priciest | Gauge how much cross-region arbitrage or savings exists. |
| Seller | Who holds the BuyBox (Amazon vs third party) | Amazon-sold markets often price sharper than 3P-only ones. |
Why do Amazon prices differ by country?
- Currency and FX movement. Prices are set in local currency; as rates move, the real USD cost drifts apart even when the sticker price is unchanged.
- Taxes, duties and shipping. VAT, import costs and fulfillment fees are baked into the displayed BuyBox price differently in each region.
- Local demand and competition. A product with few competing sellers in one country tends to carry a premium there.
- Seller mix. Different sellers win the BuyBox in different marketplaces, and Amazon-as-seller usually prices more aggressively than third parties.
Automating price comparison with the Asgard API
Checking one ASIN by hand is easy; monitoring a whole catalog across 18 marketplaces is not. The Asgard Amazon API returns the same BuyBox data in structured JSON, so you can loop over marketplaces and ASINs on a schedule:
const markets = ["us", "uk", "de", "jp", "ca", "au"];
const prices = await Promise.all(
markets.map(async (country) => {
const res = await fetch(
"https://api-v2.asgardata.com/amazon/product/buybox?" +
new URLSearchParams({ asin: "B09XY12345", country }),
{ headers: { "x-api-key": process.env.ASGARD_API_KEY } }
);
const data = await res.json();
return { country, price: data.result?.buybox?.price ?? null };
})
);
console.log(prices);Convert each to a common currency, store the results, and you have a hands-free international price monitor — the exact engine behind the free tool, at catalog scale.
Frequently asked questions
How does the Amazon price comparison tool work? Enter one ASIN and it checks the live BuyBox price across every major Amazon marketplace at once, converting each local price to USD with live exchange rates so you can rank markets from cheapest to most expensive.
Is it free and do I need an account? It's completely free with no signup beyond your email. It's powered by the Asgard Amazon API, which checks Amazon in real time.
Why is my product missing in some marketplaces? ASINs are region-specific, so the same identifier doesn't exist in every country. Those markets are marked "Not sold here" instead of showing a price.
How are the USD prices calculated? Each marketplace returns a local-currency price; the tool applies live USD exchange rates so the comparison and the price-spread percentage are like for like.
Related reading
- Free Tool: Amazon Keyword Rank Checker
- Track any Amazon product's rating and review count for free
- Daily keyword rank tracking for Amazon in 2026
Compare a product's price across the world, free:
☞ Free Amazon Price Comparison Tool · API docs at asgardata.com