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Remove duplicate lines
Delete repeated lines from a list while keeping the first occurrence.
Free to use · Runs in your browser · No signup
This tool works in your browser. Enable JavaScript to select files and create your download.
How to use Remove duplicate lines
- Paste a list with one item per line.
- Choose whether matching is case sensitive and whether surrounding spaces are ignored.
- Copy or download the list with duplicates removed.
What you need
Nothing to upload. Type or paste directly into the tool; results update as you go.
Your result
A deduplicated list and the number of lines removed.
Before you start
The first occurrence of each line is kept in its original position. Lines that differ only by spaces are treated as duplicates unless you turn that option off.
Questions about Remove duplicate lines
How do I use Remove duplicate lines?
Paste a list with one item per line. Choose whether matching is case sensitive and whether surrounding spaces are ignored. Copy or download the list with duplicates removed.
What does Remove duplicate lines produce?
A deduplicated list and the number of lines removed.
What should I check before using Remove duplicate lines?
The first occurrence of each line is kept in its original position. Lines that differ only by spaces are treated as duplicates unless you turn that option off.
Is what I type sent anywhere?
No. The calculation runs in your browser, and the text or numbers you enter are not uploaded or stored.