Free ASIN Lookup
Paste any Amazon ASIN and get the product name, brand, images, UPC, EAN, variations, and buy box data in seconds. 10 free lookups every day, no signup needed.
Free daily lookups · UPC, EAN, GTIN, ISBN & ASIN · 1.6B+ products
An ASIN lookup finds the product behind any Amazon ASIN. Paste the 10-character code into the search box above and you get the product name, brand, images, UPC, EAN, variations, and buy box data in seconds. It is free to use, with 10 lookups included every day.
TL;DR
- •An ASIN is the 10-character code Amazon gives every product in its catalog.
- •Paste any ASIN above to see the full product record, drawn from 1.6B+ indexed products.
- •You also get the matching UPC and EAN, which Amazon does not show on the product page.
- •Sellers use ASIN lookups to match supplier stock, check variations, and track the buy box.
What is an ASIN?
ASIN stands for Amazon Standard Identification Number. It is a 10-character code made of letters and numbers that Amazon assigns to every product in its catalog. Most ASINs start with B0. For books, the ASIN is the same as the ISBN-10. An ASIN identifies a product on Amazon only. Outside Amazon, the same product is identified by its UPC, EAN, or GTIN.
How do I look up an ASIN?
There are three easy ways, and all three use the same database.
- Paste the ASIN into the search box on this page. You get the full product record in seconds.
- Use the EcomSource Chrome extension. It shows the ASIN, UPC, and EAN on the Amazon product page while you browse, so you never have to switch tabs.
- Send the ASIN to our API. One call returns the whole record as clean JSON, which is the best route if you need to check thousands of products.
Not sure where the ASIN is? Open any Amazon product page and look at the web address. The code after /dp/ is the ASIN. It is also printed in the Product Information section further down the page. For the full backstory, read what an ASIN is and how Amazon assigns one.
What does the ASIN lookup show you?
Every result is built from our index of more than 1.6 billion products (EcomSource platform data, August 2026). A single lookup returns:
| Field | Why it matters |
|---|---|
| Product title, brand, and images | Confirm you are looking at the exact item, not a similar one. |
| UPC, EAN, and GTIN | Match the Amazon listing to supplier catalogs, invoices, and retail shelves. |
| Parent and child variations | See every size and color grouped under one listing before you buy stock. |
| Buy box price and sales rank | Judge demand and current pricing at a glance (Starter and Pro plans). |
| Category and dimensions | Estimate storage and shipping before inventory arrives. |
Where do I find an ASIN on a product?
Physical products do not have the ASIN printed on the box. The barcode on the box is the UPC or EAN. Amazon links that barcode to an ASIN inside its catalog. So if you are holding a product and want its ASIN, scan or type the barcode into our UPC to ASIN converter and it returns the Amazon listing.
Boxes in Amazon warehouses often carry an FNSKU label instead. An FNSKU is a fulfillment barcode that ties a unit to one specific seller. It starts with X0 and is not the same as the ASIN.
ASIN vs UPC vs FNSKU: what is the difference?
If you want the full picture of how these codes fit together, read our guide to product identifiers. It explains the universal codes in plain language, with examples.
| Code | Length | Who assigns it | Where it works |
|---|---|---|---|
| ASIN | 10 characters | Amazon | Amazon catalog only |
| UPC | 12 digits | GS1, through the brand | Retail worldwide, marketplaces, POS |
| EAN | 13 digits | GS1, through the brand | Retail worldwide, common outside the US |
| FNSKU | 10 characters, starts with X0 | Amazon fulfillment | Amazon warehouses, one seller only |
Why do sellers run ASIN lookups?
Sourcing. You found a deal from a supplier and need to check whether the item already sells on Amazon, and under which ASIN.
Listing checks. Wrong variation mapping and duplicate ASINs cost sales. A lookup shows how Amazon has the product grouped right now.
Buy box tracking. Starter and Pro plans include the current buy box price and sales rank with each lookup.
Catalog matching. Match your internal SKUs and supplier UPCs to ASINs once, then keep your inventory synced across channels.
Need to convert instead of look up?
If you already have the ASIN and need the barcode, use the ASIN to UPC converter. If you have the barcode and need the Amazon listing, use the UPC to ASIN converter. Both run on the same 1.6B+ product index as this page.
For developers
Everything this page does is available as an API call. Send an ASIN, get back the full record as JSON, including identifiers, images, variations, and attributes. The Amazon product data API page shows request examples in cURL, Node.js, and Python, and the free Sandbox plan includes 10 calls per day so you can test without a card.
What about reverse ASIN lookup?
People use the phrase reverse ASIN lookup for two different jobs. One is keyword research: finding which search terms a listing ranks for, which is a job for advertising tools. The other is identifier resolution: starting from an ASIN and recovering the product identity behind it, the UPC, EAN, brand, and variation family. This page does the second job, and does it in one step.
Three details that keep your checks accurate
ASINs are case sensitive and always written in capitals. B07FCZSC41 and b07fczsc41 are the same code, but paste it in capitals to avoid tool mismatches.
The same product can carry different ASINs in different Amazon marketplaces. If you sell in the US and Europe, check the ASIN per marketplace instead of assuming one code travels.
A missing match is information too. If an ASIN returns nothing, the listing may be new, suppressed, or merged. Re-check the barcode from the physical product before assuming the data is wrong.
Try it now
Paste any ASIN into the search box above and see the full product record. Free plan includes 10 lookups every day. No signup, no card. See the pricing page for paid plans. For lists, use bulk barcode lookup.
Frequently Asked Questions
What does ASIN stand for?
ASIN stands for Amazon Standard Identification Number. It is the 10-character code Amazon assigns to every product in its catalog. Most start with B0. Books use their ISBN-10 as the ASIN.
Is an ASIN the same as a UPC?
No. A UPC is a 12-digit barcode used across all retail, managed by GS1. An ASIN is Amazon's own code and only works on Amazon. One product usually has both, and our lookup shows the pair together.
How do I find the ASIN of a product?
On Amazon, check the web address of the product page. The code after /dp/ is the ASIN. You can also find it in the Product Information section. If you only have the physical item, look up its barcode with our UPC to ASIN converter.
Is this ASIN lookup free?
Yes. The free plan includes 10 lookups per day with no signup. Paid plans start at $10 per month for 3,000 monthly lookups and add variation data, buy box pricing, and sales rank (see the pricing page, figures current as of August 2026).
Can I look up many ASINs at once?
Yes. The bulk barcode lookup accepts lists, and the API handles thousands of requests per day on paid plans. Both return the same fields as this page.
Do books have ASINs?
Yes. For most books, Amazon uses the ISBN-10 as the ASIN. Newer books that only have an ISBN-13 still get a separate 10-character ASIN.
Is an ASIN the same in every Amazon marketplace?
Not always. Amazon assigns ASINs per catalog, and the same product can carry different ASINs in different countries. Check the marketplace you actually sell in.