How to Standardize Dates
- 1Upload your CSV file with mixed date formats
- 2Tool detects and converts dates to YYYY-MM-DD format
- 3Download standardized CSV file
Standardize Date Formats in CSV - Convert to YYYY-MM-DD
Standardize date formats in CSV files. Convert all dates to YYYY-MM-DD format. Free CSV date formatter. Fix inconsistent dates. 100% private.
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Standardize Dates
Convert mixed dates into one standard format (YYYY-MM-DD).
Upload your files
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Max 1 file(s).csv
Why Use This Tool?
- ✓Universal Format - ISO 8601 standard (YYYY-MM-DD)
- ✓Auto-Detection - Recognizes common date formats
- ✓Database-Ready - Compatible with SQL databases
- ✓Fix Inconsistencies - Unify mixed formats
- ✓Preserve Non-Dates - Only affects date-like values
Frequently Asked Questions
What date formats are recognized?
The tool recognizes common formats like MM/DD/YYYY, DD-MM-YYYY, and text dates like "Jan 15, 2024". All are converted to YYYY-MM-DD.
What if a date cannot be parsed?
Values that cannot be reliably parsed as dates are left unchanged. This prevents accidental corruption of non-date data.
Why YYYY-MM-DD format?
It's the ISO 8601 international standard, sorts correctly alphabetically, and is universally accepted by databases and programming languages.