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PREFLIGHT CHECK

Mercari Shops CSV encoding checker

Check whether a Mercari Shops CSV decodes cleanly as Shift_JIS or UTF-8 before upload.

Check file

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

What this tool checks

  • Check whether a Mercari Shops CSV decodes cleanly as Shift_JIS or UTF-8 before upload.

What it cannot verify

Live service-side state, account-specific settings, remote server reachability and current master data are not asserted. Always prefer the latest official service information.

About this tool

Mercari Shops CSV encoding checker is a free browser-based preflight utility from BlueprintLab Tools. Check whether a Mercari Shops CSV decodes cleanly as Shift_JIS or UTF-8 before upload.

No account is required. File contents are processed locally in your browser whenever possible.

How to use

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