Free Duplicate Line Remover — Clean Text, Keep Original Order
The Duplicate Line Remover tool helps you quickly remove repeated lines from any text. Just paste your content, choose whether you want case-sensitive or case-insensitive filtering, and get a clean list of unique lines while keeping the original order intact.
It is useful for content writers, developers, data cleaners, students, and anyone who works with text files, logs, or lists. You can also copy cleaned results with one click using the built-in copy button.
✔ Remove duplicate lines instantly
✔ Option to enable or disable case-sensitive match
✔ Keeps original line order (no sorting unless chosen)
✔ Case-insensitive removes lines like Hello, hello, HELLO as duplicates
✔ Case-sensitive keeps them as unique if they differ by case
✔ Matches exact including punctuation (., !, ?), spaces, tabs
✔ Supports large text blocks (logs, lists, entries)
✔ Copy to clipboard button for instant use
✔ Works online — no installation, no signup
How to Use Duplicate Line Remover
Paste your text or list of lines into the input box.
Checked (ON): Removes only exact duplicates (case and punctuation must match). Unchecked (OFF): Removes duplicates even if case differs (Hello, hello, HELLO → 1 left).
The tool instantly processes and keeps only unique lines while preserving the original order.
Use the Copy Results button to copy cleaned text and use it anywhere.
Free Duplicate Line Remover — Clean Text, Keep Original Order
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