Deduplicate spreadsheets without breaking columns.
When copying cells from Excel or Google Sheets, invisible tab characters (\t) separate each column. DeDupe Kit ensures they are never erased or replaced by spaces.
Why legacy deduplicators ruin your spreadsheet data
Many old online tools (including dedupelist.com) execute code like:
By replacing tab characters with 4 spaces, the clipboard loses its cell-boundary information. When you paste the result back into Excel or Google Sheets, everything collapses into a single column with broken alignments.
What happens on legacy tools:
With DeDupe Kit's Delimiter Guard:
Step-by-Step
How to deduplicate spreadsheet data in 30 seconds
Follow this frictionless workflow for guaranteed clean results.
Copy Cells
In Excel, Google Sheets, or Apple Numbers, highlight your target rows and press Ctrl+C or ⌘+C.
Paste & Configure
Paste into DeDupe Kit (Ctrl+V). Open "More Options" to deduplicate by entire row or by a specific column (e.g. Email).
Paste Back
Click the Copy button and paste straight back into your sheet. All rows, columns, and data types snap back into their exact cells without formatting drift.
Column-Specific Deduplication
Imagine you have a customer export with columns for ID, Full Name, Email, and Sign-up Date. If a customer changed their name or signed up on two different dates, their entire row isn't identical—but their Email is duplicate!
With DeDupe Kit, choose Tab Delimited and select By Col 3 (Email). DeDupe Kit will inspect only the email column for duplicates while keeping the complete customer record intact in the output!