List & CSV Deduplicator
Remove duplicate entries from lists and CSV files by column — order-preserving, entirely in your browser
About this tool
Free duplicate remover for lists and CSV files: dedupe by column, keep first occurrence, case and trim options. 100% private, runs in your browser. List & CSV Deduplicator runs in the browser on DevTools. There is no signup, and your input stays on this device unless the tool explicitly performs a live network lookup.
What this tool does not do
- List & CSV Deduplicator is a free in-browser utility, not a hosted API. It does not keep server-side history and is not a substitute for production verification in your own stack.
How do I use this tool?
How do I use List & CSV Deduplicator?
Open List & CSV Deduplicator, enter or paste your input, and copy the result. The page works without an account.
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