Remove Duplicate Rows from CSV Online
Remove duplicate rows from CSV/TSV data online instantly. Exact-row matching, works with any delimiter, keeps original order. Free, 100% client-side.
Input · csv0 chars
Output · csv0 chars
🔒 100% private: this tool runs entirely in your browser. Your data is never uploaded, stored or logged anywhere.
How to csv dedupe
- Paste CSV data.
- Duplicate rows are removed immediately — first occurrence kept, order preserved.
- Copy or download the cleaned CSV.
FAQ
How is a duplicate detected?
Rows are compared on their exact cell values (after CSV parsing), not raw text — so "a,b" and ""a","b"" dedupe correctly.
Is the header row protected?
The header is just row 1 — it is kept, and it participates in dedupe only if a data row were identical to it (rare).
Can I dedupe by one column only?
Not yet — currently whole-row matching. Column-based dedupe is on the roadmap.