Paste one item per line, then click Run; the de-duplicated list appears in the output box, ready to copy.
- Paste or type your list into the input box, keeping one item on each line.
- Click Run. The first copy of each exact line is kept; every later repeat is dropped.
- Copy the cleaned list from the output box below. Edit the input and click Run again any time to redo it.
Remove Duplicate Lines
FreetoolOnline Editorial TeamStrip repeated lines out of a text block, right in your browser. Paste your list with one item on each line, then click Run; the cleaned list appears in the output box below, ready to copy.
The tool reads your list top to bottom and keeps the first time it sees each exact line, dropping every later repeat - the lines that remain stay in their original relative order. That makes it a quick way to trim a pasted list of email addresses, tags, or product IDs down to the unique set, or to clean up lines copied from a log file or a spreadsheet column before reusing them.
One thing to know: the comparison is case-sensitive and whitespace-sensitive, so "Apple" and "apple" count as different lines, and a line with a trailing space is different from one without. Run a case converter first if your list mixes capitalization and you want those variants folded together.
De-duplication runs entirely in this browser tab using plain JavaScript - nothing you type or paste is uploaded, sent to a server, or saved. Refreshing or leaving the page clears the box; there is no history and no account.
For other quick text jobs, see the sort text lines tool or the word counter, both of which run the same way - fully in your browser, with nothing uploaded. A step-by-step walkthrough lives in the Remove Duplicate Lines guide.
Frequently Asked Questions
What does Remove Duplicate Lines do?
It strips repeated lines out of a pasted list. Paste your list with one item per line and click Run; the cleaned list appears in the output box, in the same order as your original list minus the repeats.
Which copy of a repeated line does it keep?
The first one. The tool reads your list top to bottom and keeps the earliest occurrence of each exact line, dropping every later repeat.
Does it treat "Apple" and "apple" as the same line?
No. The comparison is case-sensitive, so different capitalization counts as a different line. Convert the list to one case first if you want those variants treated as duplicates.
Is my text uploaded or saved anywhere?
No. De-duplication runs entirely in your browser using plain JavaScript. Nothing you type or paste is uploaded or sent to a server, and nothing is saved - refreshing or leaving the page clears the box.