Paste CSV to get started
Format, validate, preview, or convert CSV data entirely in your browser.
Paste CSV to get started
Format, validate, preview, or convert CSV data entirely in your browser.
CSV Deduplicator
Deduplicate CSV rows by one or more key columns while preserving stable first-seen row order.
CSV Deduplicator Use Cases
- Clean customer exports before import
- Remove duplicate events in analytics CSVs
- Normalize joined data from multiple sources
CSV Deduplicator FAQ
How are duplicates determined?
Rows are considered duplicates when selected key-column values match exactly.
Which row is kept?
The first row encountered for each unique key is kept, preserving input order.