Does it keep the first occurrence?

Yes — the first time a line appears is kept, and any later duplicates of that same line are removed.

Is duplicate matching case-sensitive?

You can toggle case-sensitive or case-insensitive matching.

Can it sort the results too?

Yes — after deduplicating, choose ascending (A-Z) or descending (Z-A) from the sort dropdown, or leave it on "None" to keep the original order.

Is my text uploaded anywhere?

No — deduplication runs entirely in your browser. Nothing you type or paste is sent to a server.

Does it treat leading or trailing spaces as making a line different?

By default two lines that only differ in leading/trailing whitespace may still be treated as duplicates once trimmed — check the tool's options if you need whitespace-sensitive comparison instead.

Remove Duplicate Lines

Delete duplicate lines from your text with live statistics.

TL;DR: Remove Duplicate Lines is a free, browser-based tool that lets you delete duplicate lines from your text with live statistics.

Input List (One Item Per Line)

Deduplicated Unique List

Case-insensitive Trim whitespace Remove blank lines

Sort:

Total: 0 lines • Unique: 0 lines • Removed: 0 duplicates (0%)

About Remove Duplicate Lines

Delete duplicate lines from your text with live statistics, Unicode support, and instant formatting controls. Free, private, and instant in your browser.

How to Remove Duplicate Lines

Paste your text into the input box — duplicates are removed automatically as you type.
Toggle Case-insensitive if "Apple" and "apple" should count as the same line.
Trim whitespace and Remove blank lines are on by default; untick either if you need to keep them.
Optionally sort the result A→Z or Z→A using the sort dropdown.
Copy the cleaned list or download it as a text file.

Frequently Asked Questions

: Yes — the first time a line appears is kept, and any later duplicates of that same line are removed.
: You can toggle case-sensitive or case-insensitive matching.
: Yes — after deduplicating, choose ascending (A→Z) or descending (Z→A) from the sort dropdown, or leave it on "None" to keep the original order.
: No — deduplication runs entirely in your browser. Nothing you type or paste is sent to a server.
: By default two lines that only differ in leading/trailing whitespace may still be treated as duplicates once trimmed — check the tool's options if you need whitespace-sensitive comparison instead.

100% Client-Side Privacy Guarantee

All processing runs locally inside your browser using JavaScript and HTML5 APIs. Your data, files, and inputs are never uploaded to any remote server. Complete privacy by design.

Cite This Tool

Referencing this tool in a paper, article, or bibliography? Copy a ready-made citation below.

NexLove.org. (2026). Remove Duplicate Lines [Software]. https://nexlove.org/tools/remove-duplicate-lines.html

“Remove Duplicate Lines.” NexLove.org, 2026, nexlove.org/tools/remove-duplicate-lines.html.

NexLove.org (2026) Remove Duplicate Lines. Available at: https://nexlove.org/tools/remove-duplicate-lines.html (Accessed: 2026).

@misc{nexlove_remove_duplicate_lines,
  title = {Remove Duplicate Lines},
  author = {{NexLove.org}},
  year = {2026},
  url = {https://nexlove.org/tools/remove-duplicate-lines.html}
}

Embed This Tool

Add the live Remove Duplicate Lines tool to your own website with this snippet — it loads the real, working tool in an iframe, not a static screenshot.

<iframe src="https://nexlove.org/embed/remove-duplicate-lines.html" width="100%" height="600" style="border:1px solid #e2e8f0;border-radius:12px" title="Remove Duplicate Lines — NexLove.org" loading="lazy"></iframe>

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