· Sara · QR Code Basics · 5 min read
10 Types of QR and 2D Codes Explained
A plain-language comparison of QR Code, Micro QR, rMQR, SQRC, FrameQR, Data Matrix, PDF417, Aztec, MaxiCode, and GS1 2D codes.
TL;DR
“QR code” is one member of a larger 2D barcode family. Standard QR Code Model 2 is the default for consumer links; Data Matrix is common on tiny industrial and healthcare items; PDF417 is used for document-like payloads; Aztec is strong for tickets; and GS1 standards define how product data travels across systems.
The codes look related because they encode data across two dimensions, but their shapes, capacities, standards, and scanner support differ.
10 Types of QR and 2D Codes Explained
QR Code Model 2
The familiar three-corner code used for links, payments, contact details, and consumer campaigns.
Micro QR Code
A compact QR variant with one finder pattern for very small print areas and limited data.
rMQR Code
A rectangular QR format designed for narrow spaces where a square symbol does not fit.
SQRC
A DENSO WAVE format that can combine public data with a restricted reading area.
FrameQR
A QR format with a central canvas area intended for images, promotion, and identification.
Data Matrix
A dense, compact code widely used for components, medical devices, and direct part marking.
PDF417
A stacked 2D barcode that can hold larger records and appears on IDs, shipping, and transport documents.
Aztec Code
A bullseye-centered code that works well on tickets and mobile screens without a large quiet zone.
MaxiCode
A fixed-size, carrier-oriented symbol developed for fast sorting and shipment tracking.
GS1 DataMatrix and GS1 QR
Standards-based symbols that carry product identifiers and attributes through supply chains and consumer experiences.
Which 2D code fits?
| Code family | Typical strength | Common setting |
|---|---|---|
| QR Code | Universal consumer phone scanning | Marketing, menus, links, payments |
| Data Matrix | Tiny durable identification | Manufacturing, healthcare, parts |
| PDF417 | Larger document-style payloads | IDs, transport, logistics |
| Aztec | Reliable mobile ticket scanning | Rail, air, and event tickets |
| GS1 2D | Interoperable product identification | Retail and supply chain |
Relevant QR code generators
Build the formats used in this guide, then test the finished code at its real size.