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