document-identity

Micro QR Code (Micro QR)

Compact single-finder-pattern variant of QR Code designed for very small label surfaces such as printed circuit board markings, government ID fields, and miniaturized credentials.

Governing Specification: ISO/IEC 18004:2015 (Micro QR variant)

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Data Format & Required Fields

Four symbol versions (M1–M4) with 11×11 to 17×17 module grids. Single finder pattern at top-left replaces the three-finder QR design. Supports numeric-only through full byte encoding.

Allowed Character SetNumeric (up to 35 digits), alphanumeric (up to 21 chars), or byte (up to 15 bytes).

Payload Length Rule Between 1 and 35 characters

Example Valid FormatID-GOV-2026-0049

Industry Guidance & Practical Applications

Government-issued ID card supplementary data fields
Miniaturized electronics component surface marking
Medical device implant identification labels

Packaging & Scanning Notes: Preferred where physical label area is too small for a standard QR Code finder pattern.

Symbol Constraints & Label Guidelines

Significantly lower data capacity than full QR Code.
Requires 2-module quiet zone on all sides.