Text Deduplicator – Remove Duplicate Lines Online

Remove duplicate lines from any text instantly. Sort results alphabetically or by line length. Ignore case when comparing.

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Features

🗑️

Instant Deduplication

Remove duplicate lines with a single click. Works on any size text list.

🔤

Sort Options

Keep original order, sort alphabetically, or sort by line length (shortest/longest first).

📊

Stats Display

See how many lines were removed and how many unique lines remain.

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Privacy First

All processing is local in your browser. No data is sent anywhere.

📋

One-Click Copy

Copy the deduplicated result to your clipboard with a single click.

Aa

Case-Insensitive Mode

Treat 'Apple' and 'apple' as duplicates when case-insensitive mode is enabled.

How to Use

1

Paste Your Text

Paste or type your text with multiple lines into the input area.

2

Choose Options

Select whether to sort results and whether to ignore case when comparing.

3

Remove Duplicates

Click the deduplicate button to instantly remove duplicate lines.

4

Copy Result

Copy the deduplicated, sorted text to your clipboard.

Frequently Asked Questions

How does case-insensitive deduplication work?
When enabled, 'Apple', 'APPLE', and 'apple' are all treated as the same line and only the first occurrence is kept. The original case is preserved in the output.
What about whitespace differences?
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Can I sort the results?
Yes. Choose: Keep Original Order, Sort A-Z, Sort by Length (Shortest First), or Sort by Length (Longest First).
Does it preserve line order?
By default, yes. The first occurrence of each line is kept in its original position. Use the sort options if you want a different order.
Is my data sent to a server?
No. All deduplication is done locally in the browser using JavaScript Set and string operations. Your text never leaves your device.

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