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PREFLIGHT CHECK

Mercari Shops inventory delta flag checker

Check that Mercari Shops inventory delta flags (1/2) and positive delta quantities are paired correctly.

Check CSV

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

What this tool checks

  • Delta flags 1/2
  • Positive integer quantities
  • Rows with only one paired field

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.

About this tool

Mercari Shops inventory delta flag checker is a free browser-based preflight checker from BlueprintLab Tools. Check that Mercari Shops inventory delta flags (1/2) and positive delta quantities are paired correctly.

No sign-up is required and the CSV content is processed locally in your browser.

How to use

  1. Choose the target CSV file.
  2. Run the check.
  3. Review detected issues and fix the source file if needed.