CSV Deduplicate | Remove Duplicate Rows Online

Data cleaning: Remove rows that were accidentally entered multiple times.
Column-based dedup: Treat rows as duplicates when a specific column (e.g. email, ID) matches.
Keep first or last: Choose which row to keep when duplicates are found.
Tip: CSV Inspect also detects duplicate rows and duplicate IDs.

Drag & drop a CSV file here, or click to select CSV / TSV / TXT

Deduplication mode

All columns (exact row match) Specific columns

Which duplicate to keep

First occurrence Last occurrence

When to remove duplicates?