Product Identifiers
Validate and format SKUs, GTINs/UPCs/EANs, and ISBNs.
Product identifiers like SKUs, barcodes, and book numbers have specific formatting requirements. These rules ensure your identifiers are valid, consistently formatted, and ready for product feeds and merchant platforms.
SKU (Uppercase)
Converts product codes and SKUs to uppercase with trimmed whitespace. Simple but essential for consistency across inventory systems.
GTIN / UPC / EAN (Validate)
Validates barcodes by checking the GS1 check digit. Supports GTIN-8, GTIN-12 (UPC-A), GTIN-13 (EAN-13), and GTIN-14. Valid codes are cleaned (dashes and spaces removed). Invalid codes are flagged.
The last digit of every GTIN is a check digit calculated from the preceding digits. This validation catches data entry errors.
ISBN (Format)
Validates and formats ISBN-10 and ISBN-13 book identifiers with standard hyphens. Checks the mathematical check digit to ensure the number is valid.
ISBN-13 must start with 978 or 979. The check digit uses modulo-11 (ISBN-10) or modulo-10 (ISBN-13).
When to Use This
- Product catalogs and inventory management
- Google Merchant Center feeds
- E-commerce data cleanup
- Book databases and library systems