CleanMyCSV

What it does

Finance and ops teams know the pain—export a vendor invoice, open it in Excel, and your leading zeros are gone, duplicates sneak through, and dates break. CleanMyCSV fixes all of it in seconds, right in your browser. No uploads. No server. Your data never leaves your device. → Removes duplicates → Preserves leading zeros → Before/After preview → CSV and Excel export Free up to 5,000 rows. No account needed.

100% browser-based CSV and Excel cleaner for finance & ops teams. Remove duplicates, fix formatting, preserve leading zeros. GDPR-safe by design.

Built for finance & ops teams. No uploads. No account. GDPR-safe by design. "No database" isn't enough. CleanMyCSV never sends your data to any server — not even temporarily. Everything happens entirely in your browser. 💡 Tip: If opening in Excel, use Data → Get Data → From Text/CSV and set ID columns to Text to preserve leading zeros. Or use the Excel download button for permanent preservation. Download as CSV or Excel — leading zeros preserved permanently in both formats. Unlike Excel's default import, CleanMyCSV never silently corrupts your data. Your data is never stored, never transmitted, never seen by anyone but you. Want early access to batch processing and European semicolon…from cleanmycsv.org

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