Pillar V
Types and Variants
The Quick Response Code family comprises a sequence of variants, each preserving the symbology's core decoding behavior while addressing a particular operational constraint.
The original symbology released in 1994 — retroactively known as Model 1 — was succeeded by Model 2, which remains the dominant variant in deployment today. Subsequent variants address miniaturization (Micro QR), high payload (iQR), restricted readability (SQRC), aesthetic integration (Frame QR), and rectangular form factors (rMQR).
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Model 1
The original 1994 variant of the Quick Response Code. Largely deprecated in favor of Model 2.
Model 2
The 1996 revision and the dominant variant of the Quick Response Code in deployment today.
Micro QR
A reduced-footprint variant defined for small payloads where surface area is constrained.
iQR Code
A high-capacity variant supporting larger payloads and rectangular symbol forms.
Secured QR (SQRC)
A variant with reading-restriction capability used where access to the payload must be controlled.
Frame QR
A variant that reserves a designated canvas area within the symbol for graphics or text.
rMQR Code
A rectangular variant defined for applications where a square symbol does not fit the available print surface.