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Compare Barcodes & Identifiers
11 side-by-side comparisons covering every pairing that confuses sellers, publishers, and engineers. Pair with the learning hub and free tools.
UPC vs EAN: Which Barcode Do You Actually Need?
UPC is 12 digits (North America). EAN is 13 digits (international). Learn the differences in structure, geography, Amazon acceptance, and when to use which.
Code 128 vs Code 39: Which Barcode Format Should You Use?
Code 128 is denser, supports full ASCII, and is the modern default. Code 39 is older, simpler, and lower density. Learn when each makes sense for shipping, inventory, and asset tags.
QR Code vs Data Matrix: Which 2D Barcode Should You Use?
QR Code is bigger, better for consumer scanning and URLs. Data Matrix is smaller, more durable, used for pharma serialization and PCB marking. Compare their differences.
1D vs 2D Barcodes: What's the Difference and Which to Use?
1D barcodes are linear bars (UPC, Code 128) holding ~25 characters. 2D barcodes are grids (QR, Data Matrix) holding thousands. Compare data, scanners, durability, and use cases.
GTIN vs UPC: What's the Difference?
GTIN is the universal product number; UPC is one specific 12-digit barcode format that encodes it. Learn the difference, when to use which, and how Amazon treats both.
QR Code vs Barcode: Which Should You Use?
Barcodes are 1D linear codes for retail SKUs. QR codes are 2D matrix codes for marketing, URLs, and rich data. Compare data capacity, scanners, and when to use each.
UPC vs SKU: What's the Difference?
SKU is your internal product code; UPC is the GS1-issued global retail barcode. Learn the difference, why you need both, and how Amazon and Walmart treat them.
ISBN-10 vs ISBN-13: What's the Difference?
ISBN-10 was the 10-digit format used before 2007; ISBN-13 is the 13-digit format used since. Learn the differences, how to convert between them, and which Amazon uses.
ASIN vs UPC: What's the Difference?
ASIN is Amazon's internal 10-character product ID — it only exists inside Amazon. UPC is the 12-digit retail barcode that exists globally. Learn how Amazon links them, when you need each, and what happens when they mismatch.
RFID vs Barcode: Which One Should You Actually Use?
RFID reads through cartons without line-of-sight; barcodes are 100x cheaper. Learn the cost-per-tag, scan speed, range, and read-rate differences — and why most operations still mix both.
UPC vs Barcode: Are They the Same?
Common misconception: UPC IS a barcode — specifically the 12-digit retail barcode used in the US and Canada. But not every barcode is a UPC. Here's how the terms relate and where the confusion comes from.