Remove Duplicate Lines

Paste or type your newline-separated text into the input area.

Choose whether to use exact matching, ignore surrounding spaces, ignore capitalization, or ignore both.

Select whether to keep the first or last occurrence.

Choose whether to keep one blank line or remove blank lines.

View the unique result or switch to duplicate-only mode.

Review the scanned, unique, and removed duplicate counts.

Copy the result or download it as a TXT file.

You can also load the example to see how the matching options work, or clear the text to start again.

Remove duplicate lines from text online with this free tool. Paste a list, choose how lines should be compared, and generate a cleaned result. You can ignore surrounding spaces, ignore capitalization, keep the first or last occurrence, and decide how blank lines are handled.

Use it to clean email lists, keyword lists, names, product entries, and other text where each item appears on a separate line.

Repeated entries can make a list harder to manage and may cause problems when you import, sort, or process data. Removing duplicates helps keep line-based text organized.

Common uses include:

Email lists: Remove repeated email addresses before reviewing or importing a list.

SEO keywords: Clean keyword lists collected from different sources.

Names and contacts: Find repeated names or entries in a contact list.

Product and inventory lists: Remove repeated product names, codes, or item labels.

General text: Clean copied lists, records, and other newline-separated content.

The tool compares individual lines. It does not determine whether two different lines have the same meaning.

The tool checks each line against the other lines in your input according to the matching options you select.

Exact matching

With exact matching, two lines are duplicates only when their text matches exactly. Differences in capitalization or surrounding spaces can make two lines count as different.

For example:

Apple

apple

Apple

With exact matching, these are treated as three different lines.

Ignore surrounding spaces

Enable this option to ignore spaces at the beginning and end of a line when comparing entries.

For example:

Apple

Apple

Apple

These lines are treated as duplicates when surrounding spaces are ignored.

The comparison does not automatically remove spaces between words.

Ignore capitalization

Enable this option to treat uppercase and lowercase letters as equivalent during comparison.

For example:

Apple

APPLE

apple

These lines are treated as duplicates when capitalization is ignored.

Ignore spaces and capitalization

You can enable both options to compare lines without considering their outer spaces or letter case.

This is useful when entries come from different sources and formatting is inconsistent.

When repeated lines are found, choose which occurrence should remain in the unique result:

Keep first: Retains the first occurrence and removes later matching occurrences.

Keep last: Retains the last occurrence and removes earlier matching occurrences.

The relative order of the retained lines follows their original positions in the input.

Blank lines can be treated separately from ordinary text entries.

Depending on the selected option, you can:

Keep one blank line: Retain a single blank line instead of allowing repeated blank lines.

Remove blank lines: Exclude blank lines from the output.

This is useful when cleaning copied text that contains empty lines between entries. Check the blank-line setting before processing if the spacing in your original text matters.

The tool provides two ways to view the results:

Unique result: Displays the cleaned list with one occurrence of each matching line. If the duplicate list is available, it separately shows the repeated occurrences that were removed.

Duplicate-only result: Displays the repeated occurrences instead of the unique list. This helps you review which lines appeared more than once.

The separate duplicate list is useful when you want to inspect removed entries while keeping the cleaned result intact. Duplicate-only mode changes the main output; it does not mean the unique result and the duplicate list are the same thing.

Suppose your input is:

Alice

Bob

Alice

Charlie

Bob

David

With exact matching and the first occurrence retained, the results are:

Unique result:

Alice

Bob

Charlie

David

Removed duplicate occurrences:

Alice

Bob

The tool identifies two repeated occurrences. It does not remove the original first entries.

After processing, the tool reports three counts:

Scanned lines: The number of input lines considered by the tool.

Unique lines: The number of distinct entries retained in the cleaned result.

Removed duplicates: The number of repeated occurrences excluded from the unique result.

These counts help you understand how much the list has changed. Blank-line handling and the tool's treatment of empty input can affect the totals, so check the selected settings when comparing counts.