Remove repeated lines from your text and keep only unique lines quickly and easily.
Repeated lines can make lists difficult to review. This free online tool removes duplicate text lines while keeping the first occurrence of each unique line.
The original order is preserved. The tool does not alphabetically sort your text or change the capitalization of individual lines.
Use Clear to remove the original text, cleaned result and previous counts.
Apple
Banana
Apple
appleApple
Banana
appleThe second occurrence of Apple is removed. The lowercase word apple remains because matching is case-sensitive.
In this example, the original list has four lines, the result has three unique lines, and one duplicate line is removed.
The tool compares the text of each line exactly. Apple and apple are treated as different values.
It does not automatically convert text to lowercase or uppercase before checking for duplicates.
Leading spaces, trailing spaces and tab characters are significant. A line containing extra whitespace is different from an otherwise identical line without that whitespace.
The tool does not trim spaces or normalize spelling, punctuation, email addresses or names.
When a repeated line is found, the first occurrence is retained and later identical occurrences are removed.
Remaining lines appear in their original order. No sorting is applied.
Repeated empty lines are reduced to one empty line. A line containing spaces is not the same as an entirely empty line.
An empty input contains zero lines. A final newline creates an additional empty line, which is included in the line count.
The tool recognizes LF, CRLF and CR line separators when processing text. Cleaned output uses LF line endings.
Your original input remains available in the input box until you edit or clear it.
After removing duplicates, the tool displays the original line count, the number of unique lines and the number of removed lines.
The removed count equals the original count minus the unique count.
If you change the source text, the previous cleaned result is cleared automatically. Click Remove Duplicate Lines again to generate an updated result.
You can use it to clean repeated keywords, product identifiers, simple text lists, tags and other line-based data.
For structured data such as CSV, JSON or spreadsheets, use a dedicated tool when field boundaries and data relationships must be preserved.
This tool performs exact line-by-line comparison after recognizing line separators. It does not identify similar words, spelling variations, extra spaces or equivalent Unicode representations.
It does not sort the output. Because cleaned results use LF separators, line endings may differ from those in the original text.
Review the output before using it in a system where whitespace or line endings have special meaning.
Duplicate removal runs in your browser using JavaScript. The tool does not submit your pasted text to an external duplicate-removal API.
Selecting Copy Result attempts to place the cleaned text on your device's clipboard. Clipboard access depends on your browser and device permissions.
Yes. The first appearance of each exact line is retained, and later identical lines are removed.
Yes. For example, Hello and hello are considered different lines.
No. Spaces and tabs are preserved. Lines that differ only in whitespace are not considered exact duplicates.
Repeated empty lines are reduced to one. Whitespace-only lines are compared according to their exact contents.
Yes. It accepts common line separators and uses LF line endings in the cleaned result.
No. The tool keeps the original order of the first occurrence of each unique line.
The duplicate-removal operation runs locally in your browser without calling an external text-processing API.