CSV Cleaner & Analyzer

Live

Upload any CSV and instantly detect issues: duplicates, empty cells, invalid emails, bad dates, inconsistent phones, and whitespace. Clean with one click.

Developer Toolscsv cleanercsv analyzerclean csv
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Drop CSV here or click to browse

All processing happens in your browser

About this tool

CategoryDeveloper Tools
StatusLive
Privacy100% Local

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How to use

  1. Upload a CSV file by dropping it or clicking to browse.
  2. Instantly see row count, column count, and all detected issues.
  3. Click any issue to see details about affected rows.
  4. Click Clean Data to fix whitespace and formatting issues.
  5. Preview changes side-by-side, then download the cleaned CSV.

Examples

  • Clean a 12,000-row customer list with duplicate emails and bad phone numbers
  • Fix inconsistent date formats across a financial spreadsheet
  • Remove extra whitespace and standardize an exported database dump

FAQ

Is my data uploaded to a server?

No. All processing happens in your browser. Your CSV data never leaves your device.

What issues does it detect?

Duplicates, empty cells, invalid emails, bad dates, inconsistent phone numbers, and extra whitespace.

What does 'Clean Data' actually fix?

It trims whitespace, normalizes multiple spaces, and standardizes text formatting across all cells.

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