CSV duplicate remover
Remove duplicate CSV rows by selected columns. Paste or drop; download cleaned CSV. Local only.
No uploads. No account. Free to use.
Drop a CSV
Nothing is uploaded. Processing stays on this device.
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- Files never leave your device
- Runs entirely in your browser
- No signup required
- Free
What is CSV duplicate remover?
The CSV duplicate remover keeps the first row for a chosen key (one or more columns) and drops the rest.
How to use it
- Paste or drop a CSV.
- Choose columns that define a duplicate.
- Download the cleaned file. Processing is local.
When to use it
Exports double-count contacts. Deduping in the browser means the list never sits on someone else’s disk.
Frequently asked questions
Are my files uploaded?
No. This tool runs in your browser. Files and text stay on your device and are not sent to our servers.
Does this use AI?
No. It is a deterministic utility. There is no model and no third-party processing of your data.
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