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Standardize Excel Dates

Fix mixed, broken, and text dates. Converts serial dates and irregular formats into ISO YYYY-MM-DD instantly.

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يدعم ملفات .xlsx و .xls و .csv حتى حجم 50 ميغابايت

Date Normalization

End Excel Date Format Frustrations

Inconsistent dates are the #1 cause of failed CRM, Shopify, and SQL imports. SheetClean fixes them deterministically.

ISO 8601 Output

Outputs unambiguous YYYY-MM-DD dates natively supported by PostgreSQL, MySQL, BigQuery, and Salesforce.

Serial & Epoch Recovery

Identifies Excel 1900-system day counts (like 44927) and Unix epoch timestamps without corrupting true numeric fields.

Time Component Preservation

Optionally preserve hours, minutes, and seconds in ISO datetime format (YYYY-MM-DD HH:mm:ss).

FAQ

Frequently Asked Questions

Clear answers about Excel and CSV date formatting.

Why does Excel store dates as random 5-digit numbers like 45321?▼

Excel internally stores dates as serial numbers counting days since January 1, 1900. When formatting is lost during CSV export or copy-paste, they appear as numbers. Our engine recognizes serial dates and restores readable ISO calendar dates.

How does it handle ambiguous US (MM/DD) vs European (DD/MM) dates?▼

The Agent analyzes the distribution across the entire column to determine the predominant date convention before executing standardization.

Can I choose my desired output date format?▼

Yes. You can output to ISO standard YYYY-MM-DD (recommended for databases and CRM imports), DD/MM/YYYY, or MM/DD/YYYY.

Does this repair dates that Excel misclassifies as text?▼

Yes. Invisible spaces or leading apostrophes often trap dates as text. Our cleaner sanitizes the string and standardizes it into a valid date.