1D vs 2D vs 3D Barcodes: Types, Differences & Scanners
Understand the differences between 1D, 2D and 3D barcodes, learn about popular barcode formats, and choose the right scanner for your business.
This simple guide explains common barcodes such as UPC, EAN, QR Code, Code 128, Code 39 and ITF-14.
What Are 1D, 2D and 3D Barcodes?
Barcodes represent information in a machine-readable format. Different types use different patterns and scanning technologies.
1D Barcode
A 1D or linear barcode stores data through parallel bars and spaces of different widths.
It is commonly used for retail billing, product identification and inventory management.
Examples: UPC-A, EAN-13, Code 128 and Code 39.
2D Barcode
A 2D barcode stores data using patterns of dots or squares arranged horizontally and vertically.
It can often hold more information in a smaller area than a 1D barcode.
Examples: QR Code, Data Matrix, Aztec and PDF417.
3D Barcode
A true 3D barcode uses physical depth or raised patterns as another way to encode information. Special scanning equipment may be required.
These are less common than ordinary 1D and 2D barcodes and may be used in specialized industrial applications.
Important: A normal printed QR Code is a 2D barcode, not a 3D barcode. Even an engraved QR Code can remain a 2D symbol if its data is not encoded using depth.
Quick Barcode Comparison
| Feature | 1D | 2D | 3D |
|---|---|---|---|
| Appearance | Parallel lines | Dots / squares | Depth-based patterns |
| Information | Usually less | Often more | Depends on system |
| Scanner | 1D or compatible 2D scanner | 2D image scanner | Specialized reader |
| Common Use | Retail / inventory | QR links / product data | Industrial marking |
For most retail and small business applications, a 1D barcode or 2D barcode scanner is sufficient. True 3D barcode readers are specialized.
Popular Barcode Types and Their Uses
These are common barcode formats and related product identifiers.
Note: GTIN and ISBN are identification numbers, not barcode symbol types. They can be represented using suitable barcode formats.
What Are UPC and EAN Barcodes?
UPC and EAN are among the most familiar linear barcode formats used on retail products.
UPC-A Barcode
UPC stands for Universal Product Code. UPC-A represents a 12-digit GTIN and is especially common in the United States and Canada.
EAN-13 Barcode
EAN-13 represents a 13-digit GTIN and is widely used for retail products across international markets.
The UPC/EAN retail barcode family has been used since the 1970s. Related product identifiers include GTIN-8, GTIN-12 and GTIN-13. Book identifiers such as ISBN can also be represented in EAN-13 symbols.
EAN-8 is an eight-digit format generally used when a suitable smaller retail barcode is needed.
Check Digit: The final digit of UPC-A and EAN-13 is calculated from the preceding digits to help detect common scanning and entry errors.
Is EAN Registration Mandatory?
Not every business needs an officially registered GS1 GTIN for internal barcode use. However, retailers, marketplaces, distributors and certain regulated products may require standardized identifiers.
Creating an EAN-13 image does not automatically register its number with GS1.
Which Barcode Scanner Should You Buy?
Before purchasing a scanner, check which barcode formats your business needs to read.
1D Barcode Scanner
Suitable when your business mainly scans traditional UPC, EAN, Code 128 and similar linear barcodes.
Often useful for conventional retail POS and inventory applications.
2D Barcode Scanner
A compatible 2D image scanner can read QR Codes, Data Matrix and many common 1D barcodes.
A practical choice when you need both traditional barcodes and QR Codes.
Buying tip: Check barcode-format support, USB or wireless connectivity, screen-scanning ability, and compatibility with your POS or ERP software.
Create Barcode and QR Code Images
Explore these barcode-generation resources. The original external links are retained.
Try Our Free QR Code Design Studio
Create QR Codes for website links, business information and other supported content. Customize your design, test it and download it for printing.
Open Free QR Code Design StudioGS1 Barcode Registration & DataKart
Businesses that need officially allocated GS1 product numbers can register with GS1 India. DataKart is used to manage product information.
Original DataKart link: https://gs1india.org/datakart
Current official DataKart portal: GS1 India DataKart
The consultant contact is preserved from your original article; its present affiliation or availability has not been independently verified. Registering with GS1 and generating a barcode image are separate activities.
Learn About Barcode Numbers
Watch the original barcode tutorial included in this article.
17 Common Barcode Questions
Click a question to read its simple explanation. Opening another question closes the previous one in supported browsers.
1. What is a 1D or 2D barcode?
A 1D barcode uses parallel lines and spaces. A 2D barcode uses patterns of dots or squares arranged in two directions.
2. Can a 2D scanner read a 1D barcode?
Yes. Most modern 2D image scanners can also read common 1D barcodes. Check the scanner's supported formats before purchasing.
3. Is a 2D barcode the same as a QR Code?
A QR Code is one type of 2D barcode. Other types include Data Matrix, Aztec and PDF417.
4. Is a QR Code 2D or 3D?
A standard QR Code is 2D. Its information is encoded across a flat two-dimensional pattern, not through depth.
5. What does a 2D barcode look like?
It usually appears as a square or rectangle containing small dark and light patterns. QR Codes and Data Matrix are common examples.
6. What is the difference between 1D, 2D and 3D?
1D uses linear patterns; 2D uses patterns across width and height; true 3D codes also use physical depth to encode data.
7. Why can 2D barcodes be better than 1D?
2D codes can store more information in a compact area. Many also include error correction to improve readability after limited damage.
8. What are 1D, 2D, 3D and 4D barcodes?
1D and 2D describe established barcode pattern types. 3D may describe specialized depth-based codes. 4D is not a standard general barcode category for ordinary retail scanners.
9. What is the smallest barcode size?
There is no single minimum for every barcode type. The minimum depends on the symbology, printing resolution, scanner and applicable specifications.
10. What is the most common barcode format?
UPC-A and EAN-13 are widely used for retail products. Code 128 is common in logistics, while QR Codes are popular for digital information.
11. What are the advantages of 2D barcodes?
They offer high data capacity, compact designs and, in many formats, error correction. They are useful for tracking, packaging and customer links.
12. How do you read a 2D code?
Use a compatible smartphone camera or 2D barcode scanner. Point it at the code and follow the decoded result. Check unfamiliar website links before opening them.
13. What is the difference between a QR reader and QR scanner?
The terms are often interchangeable. Both read QR Code information. Some are smartphone applications, while others are dedicated handheld scanning devices.
14. Are QR Codes free?
Static QR Codes can generally be generated and used for free. Some services charge for editable destinations, tracking or additional features.
15. What is another name for a 2D barcode?
Many 2D codes are called matrix codes or matrix barcodes. Some two-dimensional formats, such as PDF417, are stacked codes.
16. How much information can a 2D barcode hold?
Capacity depends on the format, symbol size and error correction. A maximum-size QR Code can hold up to 7,089 numeric digits under specific settings. Ordinary QR Codes often hold much less.
17. How does a 2D barcode work?
A 2D barcode encodes information in a two-dimensional pattern. A camera-based reader captures that pattern and software converts it back into data.
Start Creating Your Barcode Labels
Choose the barcode format that suits your business, verify scanner compatibility, and test the printed label before using it.
Create Your Free QR Code