Free UPC to ASIN Converter
Paste any UPC, EAN, GTIN, or ISBN to instantly map the barcode to its matching Amazon ASIN — with live title, brand, price, and rating.
No signup required. Try if you don’t have a barcode handy.
One identifies the product. The other identifies the listing.
A UPC, EAN, or GTIN is a barcode that identifies a physical product worldwide — assigned by GS1 and printed on the packaging. An ASIN is Amazon’s internal 10-character identifier for a marketplace listing.
If you have a barcode (from a manufacturer, supplier, or wholesaler) and need to find the matching Amazon ASIN, this tool does that lookup in one step — and then surfaces the live product data so you can confirm you have the right listing before you act.
Convert UPC to ASIN in three steps
Grab the barcode
Find the UPC (12 digits), EAN (13 digits), GTIN-14, or ISBN-10 from the product packaging, label, or supplier sheet.
Paste it above
Drop the digits into the form — dashes and spaces are fine, we strip them automatically.
Get the ASIN
We map the barcode to its Amazon listing and surface the ASIN plus the live product data.
What you can do with a UPC to ASIN map
Source from suppliers
Vet a wholesaler's catalog of UPCs against Amazon before you commit — confirm the ASIN, price, and stock in seconds.
Match your own SKUs
You have the manufacturer barcode but no ASIN — paste the UPC to confirm exactly which Amazon listing corresponds to your product.
Build at scale in code
Prototype here, then drop the same GTIN lookup into your app via the Canopy API to map thousands of barcodes to ASINs in one batch.
Map thousands of barcodes to ASINs
This tool is a thin wrapper around the same Canopy API our paying customers use in production. Drop the GraphQL query on the right into your app to batch-resolve supplier catalogs, normalize SKU spreadsheets, or reconcile inventory feeds — REST, GraphQL, MCP, and LLM-skill clients all hit the same endpoint.
query UpcToAsin {
amazonProduct(
input: { gtinLookup: { gtin: "0062316095" } }
) {
asin
title
brand
price { display }
rating
ratingsTotal
}
}Frequently asked questions
What is the difference between a UPC, EAN, GTIN, and ASIN?
UPC, EAN, ISBN, and GTIN are global product barcodes assigned by manufacturers and registered with GS1 — they identify the product itself regardless of where it is sold. An ASIN is Amazon-specific: a 10-character code Amazon assigns when a product is listed on its marketplace. One UPC usually maps to one ASIN per Amazon marketplace.
Which barcode formats does this tool accept?
All of the common GS1 formats: 12-digit UPC-A, 13-digit EAN-13, 14-digit GTIN-14, and 10-digit ISBN-10 (for books). Dashes and spaces are stripped automatically. EAN-8 and bookland ISBN-13 are not yet supported.
Why does my UPC not return a result?
Three common reasons: (1) the product is not listed on the US Amazon marketplace, (2) the barcode on the package is wrong or has been re-assigned, or (3) Amazon's GTIN index has not picked up a brand-new listing yet. Try the 13-digit EAN if you have it, or look up the product by name on Amazon and use the ASIN Lookup tool directly.
Is this tool free to use?
Yes. No signup required. There is a small per-IP rate limit to keep things fair — for higher volume or batched lookups across thousands of barcodes, grab an API key.
Where does the data come from?
Live from Amazon, fetched through the Canopy API. The same GTIN lookup is available programmatically over REST, GraphQL, MCP, or as an LLM skill if you need it in your own product.
Need barcode → ASIN mapping in your own app?
The Canopy API gives you the same GTIN lookup over REST, GraphQL, MCP, or as an LLM skill — at scale, with a generous free tier.