Ecommerce · catalog identity
Find variant collisions.
Open a local CSV and catch duplicate SKUs, barcodes and product-option combinations before a marketplace import turns them into ambiguous inventory.
Catalog CSV
Result
Choose or paste a CSV to begin.
What this finds
Identifiers are compared after trimming and collapsing whitespace, so BLUE-S and blue-s collide. When a product handle and option columns are present, the tool also checks duplicate option combinations within the same product. It does not decide whether a SKU is globally unique across your business, whether a barcode was issued to you, or whether a marketplace accepts a particular identifier.
Sources: Shopify product CSV Help describes handles, variants and barcode fields; GS1 identification standards explain that GTINs identify trade items. These are format and collision checks, not marketplace certification.
Frequently asked questions
Does a clean report mean the import will work?
No. It cannot see existing records in your store, inventory locations, or marketplace-specific rules. Use the platform’s own import preview.
Is the file uploaded?
No. Parsing and report generation happen locally in this browser tab.
Collision check only
A pass is not proof that an identifier is authentic, registered to you, or accepted by any marketplace.