CSV Duplicate Remover
Clean repeated CSV records without uploading a customer list or spreadsheet. Match complete rows or numbered columns, choose which duplicate to keep, and review the counts before downloading.
Matching options preserve original cell text. Blank rows are removed. Formula protection changes affected values by adding an apostrophe; spreadsheet behavior varies, especially after saving and reopening. Review untrusted files before opening them. CSV formula safety.
Deduplicated CSV
Your result will appear here.
About the CSV Duplicate Remover
Clean repeated CSV records without uploading a customer list or spreadsheet. Match complete rows or numbered columns, choose which duplicate to keep, and review the counts before downloading.
CSV processing stays in this browser. Saved-work snapshots for this tool are marked sensitive and remain local; nothing is uploaded by the deduplication operation.
How to use CSV Duplicate Remover
Paste a CSV export
Select the delimiter and whether the first row contains column headers. Quoted commas and multiline cells are supported.
Define a duplicate
Leave match columns empty to compare entire rows, or enter numbers such as 1,3. Optional case and space handling affects comparison, not the original cell values.
Review and export
Check kept, duplicate and blank-row counts. Formula-like cells are prefixed by default for spreadsheet viewing; review safety limitations before export.
Common Use Cases
Deduplicate newsletter exports by an email column.
Use CSV Duplicate Remover for this workflow without sending the input to an external service.
Clean repeated product rows before an import.
Use CSV Duplicate Remover for this workflow without sending the input to an external service.
Compare customer records while retaining the first or last occurrence.
Use CSV Duplicate Remover for this workflow without sending the input to an external service.
Frequently Asked Questions
Common questions about CSV Duplicate Remover.
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