CSV & Excel Data Validator

Run advanced quality checks on your CSV and Excel data. Set per-column rules for emails, ranges, unique values, or custom regex to ensure data integrity.

How to use CSV & Excel Data Validator

1 Load Data

Upload your CSV/Excel file or paste data. Large files are processed locally in your browser for privacy.

2 Set Rules

Select a column and choose from built-in rules like email, range, unique, or custom regex.

3 Verify & Export

Run validation to see errors highlighted. Export clean data or a full report in CSV/Excel format.

1 Load Data

Upload CSV or Excel File

Select a file to start adding validation rules

Or Paste CSV/Excel Data

2 Validation Rules

Column

Rule Type

Active Rules

3 Results & Summary

Total Rows

Total Issues

Invalid Rows

Success Rate

Validation Rules

• Required: Checks if a cell is empty or only contains whitespace.
• Format Checks: Built-in patterns for Email, URL, and Dates.
• Logic: Numeric range, uniqueness, and custom regular expressions.

Secure & Private

Your data never leaves your computer. All validation rules and data processing are executed locally in your browser. No server-side storage or tracking.