Upload a CSV or TXT file with one barcode per line. The first column is validated; common headers such as barcode, EAN, GTIN, and UPC are ignored.
Product feeds and inventory exports often contain one GTIN, EAN, or UPC per row. Uploading the list here catches unsupported lengths and incorrect check digits before the values reach a marketplace, label workflow, or internal catalogue.
Put one candidate barcode in the first column of each row. A common first-row header such as barcode, EAN, GTIN, or UPC is ignored. The tool reads up to 1,000 rows and reports the detected format and check-digit status for each entry.
Correct invalid rows in the source spreadsheet, then run the list again. A valid check digit is only a structural check; product allocation and ownership still need confirmation from an authoritative source.
The validator checks the first value in each CSV row or the complete line in a TXT file.
No. Files are processed for the current request only and are not stored by this tool.