Text
Duplicate Line Remover
Remove duplicate lines from multiline text while preserving the original order, with options for blank lines and surrounding spaces.
- Original
- 7lines
- Removed
- 3lines
- Kept
- 4lines
- Duplicates
- 2lines
- Empty
- 1lines
Cleaned result
田中さん
佐藤さん
鈴木さん
高橋さんFeatures of the Duplicate Line Remover
Remove repeated lines from multiline text while keeping the first occurrence and preserving the original order. It is useful for cleaning name lists, URL lists, product codes, TODO items, and copied spreadsheet rows.
Your input is processed in the browser and is not sent to a server.
Open detailed notes
Keep list order
The tool removes only later repeated lines, so the remaining list keeps its original order. This is helpful when order reflects priority, creation time, or a manual grouping.
Control spaces and blank lines
By default, surrounding spaces are ignored when comparing lines and blank lines are removed. You can change those options when whitespace differences are meaningful.
Comparison is line-based. If you paste table data, make sure each item you want to compare is on its own line.
Frequently asked questions
Is the text I enter saved?
No. Duplicate removal runs locally in your browser, and the input is not sent to a server.
Does it change the order of lines?
No. The first occurrence of each line is kept, and later duplicate lines are removed.
Are lines with different surrounding spaces treated as duplicates?
By default, surrounding spaces are ignored when comparing lines. Turn that option off if whitespace differences should be treated as different lines.
Can it remove blank lines?
Yes. Blank lines are removed by default. Turn off the blank-line option if you want to keep one blank line.