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Clean file

Remove duplicates from CSV

Lead lists and contact exports often contain duplicate rows after multiple pulls from the same database. Upload your CSV, review what will be removed, and download a deduplicated file.

Supports .csv

Remove CSV duplicates

How CSV duplicate removal works

  1. Upload your CSV file from any export source.
  2. Duplicate rows and repeated key values are flagged separately.
  3. Review issue counts and sample rows in the app.
  4. Apply removal and download the cleaned CSV.

Common duplicate mistakes in CSV files

  • Deduping before normalizing email casing.
  • Assuming the first row kept is always the most complete record.
  • Forgetting trailing empty columns that prevent row matching.
  • Merging files without checking for overlapping date ranges.

Before and after

Before

12,400 rows · 340 exact duplicates

After

12,060 unique rows · import-ready CSV

Have more than duplicates? Clean the entire CSV.

CSV cleaner

FAQ

Same engine, optimized for CSV uploads. Excel files can use the Excel duplicate tool directly.

No. We remove rows only — your column structure stays intact.

Analysis is free. Cleaning uses your monthly plan credits.

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Remove CSV duplicates

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