Duplicate Line Remover
Remove duplicate lines from a list or text online. Free tool to clean lists with case and trim options, right in your browser.
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Total lines
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Unique lines
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Duplicates removed
How to use the Duplicate Line Remover
- Paste a list or block of text that has repeated lines into the box.
- Choose whether comparisons should be case-insensitive, trimmed, and whether to drop empty lines.
- Pick Keep first occurrence or Keep last occurrence to control which copy of a duplicate survives.
- Check the stats for how many duplicates were removed, then copy the cleaned list.
Frequently asked questions
How are two lines considered duplicates?
Lines are compared as exact text by default. Turning on case-insensitive ignores letter case, and trim before comparing ignores leading/trailing spaces — either can be combined.
What’s the difference between “keep first” and “keep last”?
Keep first preserves the earliest occurrence of each duplicate and removes later copies. Keep last does the opposite, keeping the most recent occurrence instead.
Does removing empty lines affect duplicate counting?
If enabled, blank lines are stripped out before duplicates are counted, so they won’t be treated as duplicates of each other or included in the result.
Is my list uploaded anywhere?
No. Everything runs locally in your browser using JavaScript — your text is never sent to a server.