Free Data Matrix Barcode Generator — Create, Preview & Download Instantly

Data Matrix is a 2D matrix barcode standardized under ISO/IEC 16022, optimized for high-density data encoding in small physical spaces and direct part marking on industrial components. QR codes (ISO/IEC 18004) are larger symbols optimized for easy consumer scanning with smartphone cameras. Data Matrix is preferred in manufacturing, aerospace, medical devices, and electronics because it can be engraved directly onto parts (DPM), stores comparable data in a smaller area, and is mandated by the FDA and DoD. QR codes are preferred for consumer marketing, payments, and mobile-first applications.

ECC 200 is the error correction standard used by all current Data Matrix barcodes. It applies Reed–Solomon error correction to embed redundant data within the symbol, allowing up to 25–30% of damaged or unreadable codewords to be reconstructed by the scanner. ECC 200 replaced older, less capable correction schemes (ECC 000–140) and is the only version in active use today. All Data Matrix symbols generated by this tool use ECC 200 by default, ensuring compliance with ISO/IEC 16022 and compatibility with all modern scanners.

Data Matrix capacity depends on the symbol size (from 10×10 to 144×144 modules for square symbols, or rectangular variants). Maximum capacities at the largest symbol size (144×144) are: 2,335 alphanumeric characters, 3,116 ASCII characters, or 1,555 bytes of binary data. Smaller symbols hold proportionally less — a 16×16 symbol holds approximately 12 alphanumeric characters. For GS1 Application Identifier strings (GTIN + lot + expiry + serial), a 24×24 or 32×32 symbol is typically sufficient.

Direct part marking (DPM) is the process of permanently marking a Data Matrix barcode directly onto a component surface using laser engraving, dot-peening, inkjet, or electrochemical etching — without an adhesive label. This generator produces standard ECC 200 Data Matrix symbols in SVG and PNG formats that can be used as artwork for DPM systems, CNC laser machines, and dot-peen marking controllers. The SVG format is recommended for DPM artwork because it is resolution-independent and can be scaled to any module pitch without pixelation.

The FDA requires medical devices distributed in the United States to carry a Unique Device Identifier (UDI) label under 21 CFR Part 830. The machine-readable portion of the UDI must be encoded as either a linear barcode or a 2D barcode; for implantable and small devices where a linear barcode is impractical, Data Matrix (per ISO/IEC 16022) is the specified 2D format. The UDI must encode the device identifier (DI) and, where applicable, the production identifier (PI) including lot number, expiry date, and serial number using GS1 Application Identifiers.

The minimum scannable size depends on the marking method, surface, and scanner type. For label printing, a minimum module size of 0.25 mm is recommended, resulting in a 10×10 symbol approximately 2.5 mm × 2.5 mm. For direct part marking (laser or dot-peen), minimum module sizes of 0.15–0.20 mm are achievable with high-resolution systems and appropriate DPM scanners. General-purpose imagers (standard 2D scanners) may require modules of 0.30 mm or larger for reliable reads on DPM surfaces.

Yes. All Data Matrix encoding is performed entirely in your browser using client-side JavaScript. Your part numbers, serial numbers, UDI strings, and any other manufacturing data are never transmitted to any server and never stored or logged. Closing the browser tab clears all input data completely.