CSV Duplicate Row Remover — Remove Duplicates from CSV Online
Remove duplicate rows from CSV files online for free. Deduplicate by all columns or a specific key column. Download clean CSV instantly.
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iAbout CSV Deduplicator
Paste your CSV data and remove duplicate rows in one click. Choose to deduplicate by the entire row (all columns must match) or by a single key column such as email or ID. The tool shows exactly which rows were removed and lets you download the cleaned CSV. No file upload needed — everything runs in your browser.
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?Frequently Asked Questions
Can I deduplicate by a specific column?
Yes — select any column (e.g. email or ID) as the key, and rows with duplicate values in that column will be removed.
Which duplicate is kept — the first or last?
The first occurrence is kept; all subsequent duplicates are removed.