shopify-admin-duplicate-sku-barcode-detector

To find duplicate SKUs and barcodes in Shopify, scan product variants via Admin GraphQL productVariants queries to identify identifiers shared across multiple variants. This read-only audit prevents inventory sync failures and catalog errors without mutating store data.

Duplicate SKUs cause Shopify fulfillment errors because shared identifiers route inventory sync and orders to the wrong product variants. When multiple variants share the same SKU or barcode, 3PL systems and accounting tools cannot distinguish individual catalog items.

You should run a Shopify barcode and SKU audit after bulk product imports, catalog migrations, or routine hygiene checks. These operations frequently introduce shared identifiers across variants, making validation necessary before syncing inventory or processing downstream orders.

This duplicate SKU detector does not modify your Shopify product catalog. It operates with authenticated read-only access via GraphQL queries and produces CSV and JSON reports solely to surface duplicates for manual cleanup.

To check for blank SKUs across Shopify variants, enable the optional blank SKU surfacing feature during the audit. This flags product variants with null or empty SKU values to diagnose fulfillment or 3PL routing issues.

Shopify duplicate barcode reports are exported in CSV and structured JSON formats. These outputs provide a human-readable summary alongside a CSV file for downstream catalog cleanup and data correction.