🧹 Duplicate Line Remover
Merged two lists and ended up with repeated email addresses, keywords or IDs? Paste the lines here to remove duplicates quickly while keeping a clean list you can copy into a spreadsheet, document or another tool.
What Is a Duplicate Line Remover?
A Duplicate Line Remover finds repeated lines in a block of text and keeps only the first occurrence of each matching line.
It is useful for cleaning lists, copied data, keywords, usernames, URLs and other line-by-line text.
How to Remove Duplicate Lines
- Paste or type your text into the input box.
- Choose whether matching should be case-sensitive.
- Choose whether spaces at the beginning and end of each line should be removed.
- Enable Remove Empty Lines if you do not want blank lines in the result.
- Click Remove Duplicates.
- Copy the cleaned result when finished.
Duplicate Matching Options
Case Sensitive
When enabled, lines such as Apple and apple are treated as different values.
When disabled, differences in letter case are ignored while checking for duplicates.
Trim Spaces
When enabled, spaces at the beginning and end of each line are removed before the line is compared and added to the result.
Remove Empty Lines
When enabled, blank lines are excluded from the cleaned result.
Common Uses
- Removing repeated keywords.
- Cleaning URL lists.
- Removing duplicate names or usernames.
- Cleaning copied spreadsheet data.
- Preparing lists for further processing.
Frequently Asked Questions
Does the Duplicate Line Remover distinguish uppercase and lowercase text?
You can use the tool's case-sensitive option to control whether lines with different capitalization are treated as the same or different entries.
Can I remove blank lines and extra spaces too?
Yes. The available cleanup options can trim surrounding spaces and remove empty lines while processing your list.
Will the original order of unique lines be preserved?
Yes. The first occurrence is kept, so the cleaned output follows the order of the original list.