# UPC/EAN Barcode Validator Validate GTIN-12 (UPC), GTIN-13 (EAN), GTIN-8, and GTIN-14 product barcodes with check digit verification > Canonical page: https://elysiatools.com/en/tools/upc-ean-validator - **Category:** Validation - **Keywords:** upc, ean, gtin, barcode, product, validator, retail, isbn, checksum ## Overview The UPC/EAN Barcode Validator verifies product barcodes, including GTIN-12 (UPC), GTIN-13 (EAN), GTIN-8, and GTIN-14, by checking their check digits for accuracy and compliance. ## Inputs - **Barcode Number** (text): Enter UPC/EAN barcode (e.g., 012345678905)... - **Barcode Type** (select): Auto-detect or select type ## When to use - When importing product data into e-commerce platforms to prevent barcode errors. - Before printing barcode labels to ensure they are scannable and correctly formatted. - During inventory audits to validate existing barcodes in retail or warehouse systems. ## How it works - Enter the barcode number in the input field. - Select the barcode type from the dropdown or use auto-detection. - The tool calculates and verifies the check digit against the barcode standard. - Receive a validation result indicating if the barcode is valid or invalid. ## Use cases - E-commerce sellers verifying product barcodes before listing items online. - Retail managers checking barcode accuracy during stock replenishment. - Manufacturers ensuring barcode compliance before product shipment. ## Frequently asked questions ### What is a check digit? A check digit is a calculated number added to a barcode to detect errors during scanning or data entry. ### Which barcode types are supported? GTIN-8 (EAN-8), GTIN-12 (UPC-A), GTIN-13 (EAN-13), and GTIN-14. ### Can I validate multiple barcodes at once? No, this tool validates one barcode at a time for precise verification. ### What happens if the barcode is invalid? The tool will indicate the barcode is invalid, helping you identify and correct errors. ### Is this tool free to use? Yes, the UPC/EAN Barcode Validator is free for online use without any charges. ## Related tools - [EAN-8 Barcode Validator](https://elysiatools.com/en/tools/ean8-validator): Validate 8-digit EAN-8 / GTIN-8 product barcodes with check-digit verification, GS1 country prefix and packaging breakdown. - [EU VAT Validator](https://elysiatools.com/en/tools/eu-vat-validator): Validate European Union Value Added Tax (VAT) numbers from all EU member states - [CSV Malformed Row Surgeon](https://elysiatools.com/en/tools/csv-malformed-row-surgeon): Surgically repair malformed CSV rows one at a time: unescaped (stray) quotes, mixed delimiters (tab/semicolon/comma in the same file), BOM-prefixed headers, CRLF/CR line endings and trailing empty lines. The surgeon parses tolerantly, shows a row-level red/green diff of every change it made (before → after, with the repair reason tagged), lists the rows it accepted unchanged, and emits the cleaned CSV. Optional AI repair can review suspicious rows after the deterministic pass. 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