UPC Barcode Manager helps you assign, import, and validate barcodes across your Shopify store. Manage your own GS1 barcodes, purchase ours or import your own in seconds. Detect and fix missing, duplicate, or invalid barcodes that block marketplace listings or cause listing errors. Track all barcode assignments—even external ones—and export full reports. Whether you're syncing inventory or listing on Third Party marketplaces, this app keeps your store barcode-compliant and scalable.