001 / B2B GTM Engineering · Free Tool

Merge lists, kill duplicates.

Drop in your lead CSVs -- exports from different tools, different columns, doesn't matter. Get back one clean file with duplicates removed. Everything runs in your browser; your lists never upload anywhere.

002 / Your Files

Drop CSV files here

or click to browse -- add as many as you want

Dedupe by email

Auto-detects the email column, compares case-insensitively. Off = exact whole-row match only.

Clean while merging

Trim whitespace, lowercase emails, drop fully-empty rows.

Runs entirely in your browser. Your lists never leave this page.

Merged output

Union of all columns · live

Add at least one CSV to see the merge. Columns that only exist in some files stay -- rows just leave those cells blank.

Want this built for your pipeline?

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