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Text utilities

Duplicate Line Remover

Remove repeated lines while preserving the order of their first appearance.

Text stays in your browserCopy your result

Input workspace

Runs on your device

OUTPUT WORKSPACE

Your result

Let’s calculate.

Use the Calculate button to see your result.

Your content is processed locally.

How to use this tool

  1. Enter your lines.
  2. Select Update result to view the result.
  3. Check the method and assumptions below before using the result.

The method, explained

Split text into lines, keep the first occurrence of each exact line, and join the remaining lines in the original order.

A WORKED EXAMPLE

The lines apple, orange, apple, pear become apple, orange, pear.

What to keep in mind

Comparison is case-sensitive and preserves leading or trailing spaces. Repeated blank lines are also deduplicated.

Common questions

Are Apple and apple duplicates?

No. This tool treats uppercase and lowercase letters as different.

Does it sort the lines?

No. The first occurrence stays in its original order.

Methodology maintained by ClarityKit. How these tools are built and checked.