Remove Duplicate Lines
Deduplicate lists and text files while optionally preserving order.
About this tool
Clean email lists, keyword lists, and log excerpts by removing repeated lines. Options let you trim whitespace and ignore case when matching duplicates.
How to use
- Paste your multi-line text.
- Choose case-sensitive, trim, and order options.
- Copy the unique output and review how many lines were removed.
Examples
- Deduplicate a keyword research list.
- Clean repeated rows from exported data.
- Unique-ify a mailing list before import.
Benefits
- Preserves first occurrence order
- Case-insensitive matching optional
- Shows removed line count
- Private browser processing
Frequently asked questions
Does empty line removal happen?+
Empty lines are treated like any other line. If duplicates exist, only the first empty line is kept when keep-order is on.
Can I ignore case?+
Yes. Turn off case-sensitive matching so “Apple” and “apple” count as duplicates.
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