Data Matrix Generator makes Data Matrix ECC 200 barcodes in your browser. Type or paste text, a number or a URL and the code appears as you type. Download it as PNG, SVG or PDF with the size set in exact millimetres. It also checks GS1 element strings for GS1 DataMatrix codes.
It makes batches from a pasted list or a CSV file, numbered sequences, and label sheets for Avery 5160, 5163 and 5167 or a custom layout. Codes are generated on your device, so your text and files are never uploaded, and there is no account. Single codes and batches of up to 100 are free. Pro adds batches of up to 1,000 and thermal roll labels, at US$19.90 a month or US$129 a year. Not affiliated with GS1 or Avery.
Making a Data Matrix code at an exact size for a label should not need label software or sending product data to a server. This makes single codes, batches and label sheets in the browser.