Remove Duplicate Lines
Remove repeated lines from pasted text, exports, and plain-text lists without changing the order of the items you keep.
Use it to clean email lists, keyword sets, tag collections, logs, and copied rows where the same full line appears more than once.
Choose whether to keep the first copy or delete every repeated line, then copy the cleaned result directly into your next workflow.
Actions
Frequently Asked Questions
- What is the fastest way to use this duplicate line remover?
- Paste a list into the input box, choose whether you want to keep one copy or delete every repeated entry, and click Remove Duplicates.
- This works well for email lists, keyword exports, log snippets, copied spreadsheets, and any one-item-per-line text where repetition is the problem.
- The output stays line-based, so you can review the cleaned list immediately or copy and download it without reformatting it elsewhere.
- What counts as a duplicate line here?
- Each line is compared as a full line, not as separate words. If Ignore case is enabled, 'Apple' and 'apple' are treated as the same entry.
- Spaces still matter. 'apple' and 'apple ' are different lines because trailing and leading whitespace is preserved during comparison.
- Blank lines are also valid lines, so repeated empty rows can be removed by the same duplicate logic.
- What is the difference between the two removal modes?
- Keep one copy preserves the first instance of a repeated line and removes later repeats. This is the better choice when you want a unique list.
- Delete every repeated line removes all copies of any line that appears more than once. Use it when repeated values should disappear completely.
- In both modes, the remaining lines stay in their original order instead of being sorted or regrouped.
- Which edge cases should I check before using the result?
- If your source has accidental spaces, tabs, or inconsistent capitalization, visually similar rows may still be treated as different depending on your settings.
- Very large pasted datasets still run in the browser, so processing may take a moment on older devices, especially with long line lists.
- If you need to clean up spacing first, use Remove Empty Lines or Merge Text Lines before you remove duplicates.
- How is this different from nearby cleanup tools?
- This page removes repeated full lines. It does not remove blank rows just because they are blank, and it does not merge multiple lines into one.
- Use Remove Empty Lines when the problem is spacing between blocks, and use Merge Text Lines when you want one combined line instead of a unique list.
- Choose this tool when your main goal is to keep only unique entries while preserving the original reading order.