Duplicate Line Remover
Remove duplicate lines from text
Duplicate Line Remover is a free online tool from BrowserUtils that remove duplicate lines from text. It runs entirely in your browser — your data never leaves your device. No account required.
How to use Duplicate Line Remover
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About Duplicate Line Remover
Free online duplicate line remover. Quickly remove repeated lines from text while preserving the original order of first occurrences. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
Duplicate Line Remover specs
- Runtime
- 100% client-side (browser)
- Built on
- Native JavaScript String, Intl.Segmenter, and RegExp APIs with full Unicode support
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
Does this tool preserve the original line order?
Yes, the tool keeps the first occurrence of each unique line in its original position and removes only subsequent duplicates, so your text order is preserved.
Is the comparison case-sensitive?
By default yes, but you can toggle case-insensitive mode to treat lines like "Hello" and "hello" as duplicates.
How is this different from the Line Sorter deduplication?
The Duplicate Line Remover focuses solely on removing repeated lines while preserving original order. The Line Sorter offers deduplication as an option alongside sorting, which changes line order.
Does the duplicate line remover trim whitespace before comparing?
By default, lines are compared exactly as they appear. Enable the trim option to ignore leading and trailing whitespace when checking for duplicates.
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