DATAVEXALAB / FREE LOCAL TOOL

Check your CSV before importing.

Spot blanks, exact duplicate rows and column-count mismatches. Your data stays in this browser.

Open CSV Quality Check v3

No account. No upload. No automatic edits.

Choose or paste a UTF-8 CSV, select the delimiter and run the check. Download a JSON report or issue CSV. Keep the original file. Reports contain headers but no source cell values; review headers before sharing.

Limits: 2 MB, 10,000 data rows and 100 columns. XLSX and UTF-16 are not supported. Large files use a local Worker when available; a bounded fallback may briefly block the page.

Need help applying cleanup rules?

The checker identifies possible issues, not the correct business decision. Review our proposed human-reviewed service for one non-confidential CSV, up to 1,000 rows / 10 columns.

Read the CSV Cleaning service preview

Service not open for orders. No CSV is sent through either page.