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  3. CSV duplicate remover
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CSV duplicate remover

Drop duplicate CSV rows, comparing all columns or one key column, keeping the first or last occurrence, with quoted fields parsed properly.

This tool is in beta

Still being tested. If a result looks wrong, tell us.

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Paste CSV to drop its duplicate rows.

Comparison is exact text: two rows are duplicates only when the compared cells are byte-identical (or match ignoring case when the toggle is on), so 30 and 30.0 stay distinct. Keys never collide across column boundaries, and quoted fields holding commas, quotes, or line breaks compare whole. The tool does not trim whitespace before comparing, does not read files in place, and has no fuzzy or fuzzy-numeric matching. Paste output only; the original data stays untouched.

Compare

Compare byOne column as the key, or every column at once
Delimiter
KeepSurvivors stay in their original row order either way

The first line is always the header. Inputs stay under 2,000,000 characters, 100,000 rows, and 256 columns. Nothing leaves this tab.

More config file tools

  • CSV studio
  • CSV editor
  • SQL to CSV
All config file tools

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