Deduplicate Lines
Strip out repeated lines from any text block. Choose whether comparison is case-sensitive, whether whitespace at the ends of each line is trimmed before comparing, and whether the first occurrence of each value stays in its original position. Runs entirely in your browser.
Privacy
Runs entirely in your browser — nothing is sent to any server.
Cost
Free. No sign-up, no watermark.
Type
Transformer
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Tools that work with the same formats — most users open one of these next.
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Frequently asked
Is Deduplicate Lines free to use?
Yes. Deduplicate Lines is completely free with no sign-up, no watermark, and no usage limits. Toolsly does not charge for any of its tools.
Do my files and data stay private?
Yes — Deduplicate Lines runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How does Deduplicate Lines work?
Open Deduplicate Lines, paste or fill in the input fields, and the result updates instantly. Everything runs in your browser — no upload, no waiting.
Which browsers does Deduplicate Lines support?
Any modern browser works — Chrome, Firefox, Safari, and Edge on desktop and mobile. Deduplicate Lines uses standard web APIs and does not require any plugin, extension, or sign-up.