CSV Duplicate Remover
Deduplicate one CSV by phone, email, or custom multi-column keys. The first row for each nonblank key is retained in the unique output; later matches are written to a separate duplicates file with a reason.
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Tool information
What it does
Deduplicate one CSV by phone, email, or custom multi-column keys. The first row for each nonblank key is retained in the unique output; later matches are written to a separate duplicates file with a reason.
How it works
- Upload your CSV file
- Select match keys (phone, email, or multiple columns)
- Run the tool to group rows and identify duplicates
- Download a unique output and a duplicates output
Matching controls and outputs
Phone matching can normalize the selected phone field, while email and custom-column matching can be case-insensitive. Blank match keys can be removed to the duplicates output or retained as separate rows, depending on the selected control.
This tool deduplicates one file. To compare records between two files, use the file comparison workflow; choose managed cleanup when the file needs broader formatting, validation, or recurring delivery rules.