CSV Deduplicator

The tool reads each row of your CSV and compares it against all other rows. Rows with identical content across all columns are identified as duplicates. The first occurrence is kept and subsequent duplicates are removed.

Yes. The header row (first row) is always preserved and is not considered when checking for duplicates. Only data rows are compared and deduplicated.

This tool compares entire rows for exact matches. All columns must match for a row to be considered a duplicate. For column-specific deduplication, consider filtering your CSV to the relevant columns first.

Yes! All processing happens entirely in your browser. Your CSV data is never sent to any server. No data is collected, stored, or transmitted.

This tool handles standard comma-separated values. It correctly processes quoted fields containing commas or line breaks. Both Windows (CRLF) and Unix (LF) line endings are supported.