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Google Merchant Center GTIN length and checksum checker

Normalize spaces/dashes and validate 8, 12, 13 or 14-digit GTINs and their GS1 check digit.

Check CSV

🔒 Analysis runs in your browser; the file itself is not sent to BlueprintLab.

What this tool checks

  • 8 / 12 / 13 / 14 digits
  • Non-digit detection
  • GS1 check digit

What it cannot determine

This unofficial checker covers only rules that can be verified in the browser. Live account settings, remote server state and later service-side validation remain authoritative.

How to use this tool

Normalize spaces/dashes and validate 8, 12, 13 or 14-digit GTINs and their GS1 check digit.

  1. Use Try sample to inspect the included sample.
  2. Set ＋ Choose a CSV file Tap/click to choose. Drag and drop also works on desktop..
  3. Use Check CSV to process the input.
  4. Compare the result with your source data and return to the input to make corrections.
＋ Choose a CSV file Tap/click to choose. Drag and drop also works on desktop.
.csv,text/csv

Input and settings example

id,title,gtin
SKU001,Sample Product,4901234567894

Related tools

Marketing & CRM tools — browse all tools in this topic

Google Merchant Center identifier_exists checkerValidate yes/true/no/false and warn about obvious conflicts with GTIN, MPN and brand fields.Open  →Google Merchant Center availability value checkerValidate availability values and require availability_date context for preorder/backorder rows.Open  →Google Merchant Center condition value checkerValidate Merchant Center condition values as new, used or refurbished.Open  →Google Merchant Center image_link checkerCheck image_link values in a product feed CSV for URL length, scheme, ASCII, supported image formats and unencoded characters.Open  →

Related references: CSV / TSV · Encodings & BOM · Country codes