Barcode Not Found? 11 Reasons a UPC Lookup Comes Up Empty
Most failed barcode lookups have a simple cause: an in-store code, a dropped leading zero, an unexpanded UPC-E, a case code or a coupon. Here's how to diagnose each in under a minute.
The BarcodeReport blog
BarcodeReport Blog
Expert insights on barcode lookup, product identification, and inventory management
Amazon GTIN Requirements and How to Get a GTIN Exemption
Amazon validates UPCs against GS1 and removes listings that don't match. Here's when you need a GTIN, who qualifies for...
Barcode Country Codes: What the First Digits Really Mean
The first digits of a barcode identify the GS1 office that issued the number, not the country where the product was made...
Best Barcode Lookup APIs in 2026: Prices, Free Tiers and Database Size Compared
Ten barcode lookup APIs side by side: free tiers, entry prices, cost per 1,000 lookups, database size claims and who bil...
Barcode Lookup in JavaScript and Node.js: A Production Guide
A working UPC lookup in Node.js takes ten lines. A production one keeps the API key off the browser, retries 429s correc...
How to Get a UPC Barcode for Your Product (2026 Guide)
A UPC is a number you buy, not an image you download. Here's how UPCs.com's one-time pricing compares with GS1 US's rene...
Barcode Lookup in Python: A Complete Guide with Working Code
Look up UPC, EAN and ISBN barcodes in Python — a working client with header auth, correct error handling, rate-limit bac...
How to Build a Barcode Scanner App: From Camera Scan to Product Data
A working guide to building a barcode scanner app — reading codes from the camera with the BarcodeDetector API, handling...
Barcode Lookup for E-commerce: Enrich Listings & Inventory at Scale
How to use barcode lookup to enrich e-commerce product listings and inventory at scale — single, bulk CSV, and API workf...
Put these guides to work
Look up UPC, EAN and ISBN barcodes from your own code. 100 lookups a month are free, no card required.