Free Data Matrix code generator

A tiny square code for parts, electronics and small labels. Type any text or number.

Barcode type

Text or number

Up to 1,000 characters. Small, square and readable even when partly damaged.

Rectangular shape

For long, narrow spaces such as cables and the edge of a label.

Width (mm)

Code

Background

Transparent background (PNG, SVG, PDF)

Data Matrix is the tiny square code on circuit boards, medical devices, medicine packs and machine parts. It packs text or numbers into a very small space and still reads when part of it is scratched or smudged. Type your text, choose square or rectangular, and download a scan-tested code. PNG and JPG are free.

Where Data Matrix is used

Electronics and parts: serial numbers on boards, components and tools, often laser-etched.
Healthcare: medicine packs and medical devices, usually as a GS1 Data Matrix carrying the GTIN, batch, expiry and serial number.
Small labels: vials, test tubes, jewellery tags and anywhere a barcode won’t fit.
Mail and documents: postage marks and document tracking.

Tips for readable Data Matrix codes

Keep the data short. Fewer characters mean fewer, bigger squares at the same size.
Leave a margin. Keep blank space at least one module wide around the code; we include it in the download.
High contrast. Dark on light reads best. Laser etching and dot peen marking need a scanner that handles low contrast.
Test at the final size. Print one, then scan it with the scanner your team uses before marking parts in bulk.

Need it for people to scan with a phone? Use a QR code. For tickets and passes, Aztec reads well from screens.

Questions people ask

Data Matrix or QR code?

Both are square 2D codes. Data Matrix fits more data into a smaller space and is the standard for parts marking, electronics and healthcare packaging, read by industrial scanners. QR codes are better when people will scan with a phone, since every camera app reads them.

Can phones read Data Matrix codes?

Many scanner apps and Google Lens can, but the built-in camera on most phones only opens QR codes. If the public will scan it, use a QR code.

When should I use the rectangular shape?

When the space is long and narrow, such as a cable, a tube or the edge of a label. Square codes are smaller overall and are the default.

How small can I print it?

Each square (module) should be at least 0.25 mm for printed labels; 0.5 mm reads easily with any scanner. A short serial number makes a code just a few millimetres wide.