📝 Text Tool

Duplicate Line Remover

Paste any list or text — duplicates are removed instantly as you type, with your first occurrence kept in place.

Input — paste your text or list
Output — unique lines only
Options
Total input lines 0
Unique lines 0
Duplicates removed 0
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Live Deduplication
No button to press — the output updates the moment you paste or type, even for huge lists.
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Smart Options
Case-insensitive matching, whitespace trimming, empty-line removal, sorting and dedupe-only mode.
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100% Private
Everything runs in your browser. Your lists never leave your device.

What is a Duplicate Line Remover?

A duplicate line remover scans your text line by line and deletes every repeat, keeping only the first occurrence of each line. It's the fastest way to clean up email lists, keyword exports, log files, CSV columns and code snippets — no spreadsheet or regex knowledge needed.

❓ Frequently Asked Questions

The first occurrence stays exactly where it was — everything after it is removed. The original spelling of the first copy is preserved even in case-insensitive mode.

It inverts the output: instead of unique lines, you see just the lines that appeared more than once — handy for auditing a list before cleaning it.

No hard limit. Lists with hundreds of thousands of lines process in a fraction of a second since matching uses a hash set.

Yes, 100% free with no signup, and your text never leaves your browser.