Remove Duplicate Lines

About this tool

Delete repeated lines from your text, keeping the first occurrence of each. Perfect for cleaning up lists and logs.

Example

Input: apple banana apple cherry

Output: apple banana cherry

How to use

Paste or type your text into the box above, then read or copy the result. Everything runs privately in your browser, your text is never uploaded to a server.

How to use this tool

1. Paste or type the text that contains repeated lines.
2. Check whether duplicate lines should be matched exactly as written.
3. Run the tool to remove repeated lines and keep the first copy of each line.
4. Copy the cleaned result into your editor, file, or spreadsheet.

Step by step, what happens

1. The tool reads your text line by line, not word by word.
2. It keeps the first time each line appears and skips later repeats.
3. The original order of the first occurrences is preserved in the output.
4. Blank lines are treated like any other line, so repeated blank lines can also be removed.

Worked example

Here is a simple list cleanup example with repeated names.

Input: apple banana apple orange banana

1. The first apple is kept because it appears first.
2. The second apple and second banana are removed because they repeat earlier lines.

Tips and common mistakes

• This tool compares whole lines, so apple and apple with a trailing space are different lines.
• If your text uses different line endings from another system, paste it in as plain text first.
• If you want to remove repeated items from a list, put one item on each line before running the tool.
• Review the result if your input contains blank lines, because repeated blank lines will be collapsed too.

Frequently asked questions