SKU-first validation
Designed for Shopify Variant SKU columns and common inventory CSV exports.
Duplicate SKU checker
Find duplicate SKUs
inside your inventory CSV
Upload a Shopify or supplier CSV and find repeated Variant SKU values with row-level locations. Empty SKUs are ignored so allowed blank values do not create noise.
Drop CSV files here
or click to browse - 15 MB each, 5 files max
No signup requiredFiles deleted after processingNo data stored
Repeated SKU values
Catch the same Variant SKU appearing across multiple rows.
Exact row locations
See the rows and cells that need review before import.
Agency review
Send a focused SKU issue report back to a client.
Supplier cleanup
Check product feeds before they pollute your catalog.
Variant SKU duplicatesRow locationsCSV reportShopify product CSVSupplier inventory files
Check duplicate Variant SKU values before import
Duplicate SKUs can confuse fulfillment, inventory updates, product feeds, and reporting. This checker scans the Variant SKU column, ignores empty values, and reports repeated SKUs with their row locations.
Supplier file review
Use it before importing supplier feeds or migration spreadsheets.
Downloadable issue report
Export duplicate SKU findings as a report for clients, teams, or cleanup workflows.
Frequently asked questions
Common questions about duplicate SKU checks.
Does Shopify allow duplicate SKUs?
Some stores may technically contain repeated or blank SKUs, but duplicates often create inventory and fulfillment problems. This checker flags duplicates as issues to review.
Are empty SKUs counted as duplicates?
No. Empty SKU values are ignored because some merchants intentionally leave SKUs blank.
Which column does it check?
It checks Shopify's Variant SKU column and can detect common header variations.
Can I download the duplicate SKU report?
Yes. The full error report includes duplicate SKU rows, fields, severity, and messages.