Does it matter if lines have different leading or trailing spaces?

There's a whitespace-trimming option so lines that differ only by spacing can still be recognized as duplicates.

Which copy of a duplicate line is kept?

The tool keeps the first occurrence of each line and removes every later repeat, preserving the original order.

Yes, it works well for deduplicating pasted email lists, keyword lists, or any line-separated data.

text Client-Side Only

Deduplicate line-by-line lists with case-sensitivity and whitespace-trimming options.

Case SensitiveTrim Whitespace

Removed 3 duplicate line(s) (4 remaining)

Original List (7 lines)

Deduplicated List (4 lines)

apple
banana
orange
grapes

Simple steps, pro tips, and execution details

Type, paste, or select your values in the form fields below.

Calculations and formatting happen automatically with zero delay as you type.

Copy results or apply the clean output directly to your projects.

Iterates through line breaks and discards recurring entries.

Common questions about calculations, assumptions, and edge cases.

You can toggle case sensitivity, so "Apple" and "apple" can be treated as duplicates or as distinct lines depending on your choice.

Learn how to clean email lists, URL rosters, CSV columns, and data files by eliminating duplicate lines with case-sensitive and trim options.

Sort lists alphabetically (A-Z, Z-A), by line length, or randomize order.

Remove duplicate spaces, empty lines, HTML tags, and trailing whitespace from raw text.