SKU-first validation
Designed for Shopify Variant SKU columns and common inventory CSV exports.
fantastic-bronze-lampPrice
mediocre-leather-plate✓ OK
copper-benchBarcode
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
Live preview
products.csvReady
HandlePriceStatus
fantastic-bronze-lamp$20.03
mediocre-leather-plate5.45
intelligent-copper-bench44.31
1 auto-fixable · 1 needs reviewAuto-fix →
This is what your results look like after upload
16+
Issue types checked
Auto-fix
Safe errors fixed for you
0 bytes
Data stored on server
Why imports fail
What breaks Shopify CSV imports
The checker finds these automatically and tells you exactly which row and cell to fix.
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
How it works
Check duplicate Variant SKU values before import
Duplicate SKUs break inventory tracking, fulfillment routing, Google Shopping feeds, and third-party warehouse integrations. They are especially common in supplier sheets where the same physical product appears under multiple variant rows. This checker scans every non-empty Variant SKU value, finds repeated ones, and shows you their exact row locations so cleanup is fast.
Supplier file review
Use it before importing supplier feeds or migration spreadsheets.
Auto-fix preview
$20,03→20.03
FANTASTIC LAMP!→fantastic-lamp
“Greatâ€→"Great"
Downloadable issue report
Export duplicate SKU findings as a report for clients, teams, or cleanup workflows.
B2 · Variant Price · error
Currency symbol in price field
E4 · Handle · error
Invalid handle format
Questions and answers
Frequently asked questions
Common questions about duplicate SKU checks.
Do Shopify product variants need their own unique SKU?
Shopify does not technically enforce SKU uniqueness, but each variant should have a distinct SKU for inventory tracking, order routing, and channel integrations like Google Shopping or Amazon to work correctly.
My supplier sends the same SKU for multiple products. Is that a problem?
Yes. If two different products share a SKU, inventory updates and order fulfillment will apply to the wrong variant. The checker flags all rows sharing a SKU so you can decide which to rename.
Are blank SKUs counted as duplicates?
No. Empty SKU values are ignored because many merchants intentionally leave SKUs blank on some variants.
Can duplicate SKUs cause problems with Google Shopping or Meta feeds?
Yes. Product feed platforms use SKU or variant ID as a unique key. Duplicate SKUs cause feed rejections, wrong inventory signals, and mismatched ads.