When to Use These Tools
Use these tools when pasted lists or spreadsheet exports need browser-side cleanup before import or analysis.
- Find duplicate email addresses
- Detect and convert CSV delimiters
- Convert Excel serial dates
CSV Data Cleanup Tools
Find duplicate emails, fix delimiters, convert Excel serial dates, and clean analyst-friendly exports locally.
Search Intents Covered
These pages target distinct jobs, so each result leads to a different working checker, converter, preview, or calculator.
- csv duplicate email checker
- csv delimiter converter
- excel serial date converter
Available Tools
Direct links for this workflow.
Validate
CSV Duplicate Email Checker Paste a list or CSV export to group duplicate email addresses and copy a cleaned unique list.
Create
CSV Delimiter Detector and Converter Detect CSV separators and convert rows to comma, semicolon, tab, or pipe-delimited output.
Create
Excel Serial Date Converter Convert Excel serial date numbers into readable dates with 1900 and 1904 date-system support.