# Remove duplicate lines

Clean a list by removing repeated lines

Use it at https://www.quicktoolz.com/tools/remove-duplicate-lines. From QuickToolz.

Paste a list to remove repeated lines. The first copy of each line stays, in its original order, and we tell you how many were removed. You can ignore capitals, ignore spaces at the ends of lines, and sort the result. It’s useful for email lists, keywords and logs. Nothing leaves your browser.

## How it works

Keep the first of each line, and drop any later copies.

We go through the lines in order and remember each one. Any later copy is dropped, so the order of your list doesn’t change unless you sort it.

Worked example: A list of “apple, pear, apple, plum” becomes “apple, pear, plum”, in the same order.

## Examples

| Lines in | Lines out |
| --- | --- |
| a, b, a | a, b |
| x, x, x | x |

## What this tool doesn't cover

- Lines must match fully. Similar lines aren’t treated as the same.

## Questions

### Which copy is kept?

The first one. Later copies are removed.

### Does it treat Apple and apple as the same?

Only if you untick Match case.

### Is my text uploaded?

No. Everything happens in your browser, and your text isn’t saved or sent anywhere.

### How do I remove duplicates from a list?

Paste one item per line, and the tool keeps each line once. It’s handy for email lists, keywords and log files.

### Does it keep the original order?

Yes. Lines stay in the order you pasted them, with later copies removed.

## Sources

- [Unicode Standard](https://www.unicode.org/standard/standard.html)