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CSV Deduplicator

Remove duplicate rows from CSV datasets in seconds. Choose any column as the unique key or compare full rows for perfect deduplication.

What this tool does

CSV Deduplicator helps you remove duplicate rows from CSV datasets in seconds. Choose any column as the unique key or compare full rows for perfect deduplication.

What you get

CSV Deduplicator produces a direct output in this page and keeps all processing on your device, with nothing uploaded to our servers.

Free to use, no watermarks, runs in your browser—nothing uploads to our servers

CSV samples

Loaded sample: Default sample

CSV data

Supports header rows, quoted values, and multi-line fields.

Delimiter

Use first row as headers

Add secondary CSV

Report a bug

If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.