Date Formatter

Standardize inconsistent date formats across your data

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Drop your Excel file here

Standardize date formats across your data

Common Date Format Issues

DD/MM vs MM/DD

15/09/2025 vs 09/15/2025

Excel Serial Numbers

45553 → 2025-09-15

Mixed Separators

15-09-2025 vs 15/09/2025

Before & After

Inconsistent Dates

15/09/2025
2025-09-16
09-17-2025
45553

Standardized (YYYY-MM-DD)

2025-09-15
2025-09-16
2025-09-17
2025-09-15

Frequently Asked Questions

What date formats can it fix?

The tool handles DD/MM/YYYY, MM/DD/YYYY, YYYY-MM-DD, Excel serial numbers (like 45553), and various separator styles.

How does it handle ambiguous dates?

For dates like 01/02/2025, it assumes DD/MM/YYYY format (common in India). If the day exceeds 12, it automatically detects the correct format.

What target formats are available?

You can convert to: YYYY-MM-DD (ISO standard), DD/MM/YYYY, MM/DD/YYYY, DD-MM-YYYY, or YYYY/MM/DD.