Regex Tester & Validator

This regex matches a GS1-compatible barcode structure containing three application identifiers: a GTIN (01), a batch/lot number (10), and a quantity (30), followed by a literal plus sign. It is useful for extracting product identifiers, lot codes, and quantities from concatenated barcode data in supply chain and inventory systems. The pattern assumes each field is fixed-length or variable-length as per GS1 standards, with the plus acting as a terminator.