Remove Duplicate Lines
Paste a list and delete every repeated line in one click. Keeps the original order — free, no signup, nothing is uploaded.
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Paste a list and delete every repeated line in one click. Keeps the original order — free, no signup, nothing is uploaded.
How to use Remove Duplicate Lines
- Paste or type your contentThe result appears as you type — there is no submit button.
- Set “Ignore case”
- Read and copy the resultThe output updates live and the copy button takes it in one click.
Nothing you enter leaves your device
All of the work happens inside your browser. Whatever you type is never packaged up and sent to a server, and no request this page makes carries it.
That makes it safe for contract amounts, personal details and internal documents you would rather not hand to a third party — close the tab and it is gone.
What this tool does not do
Remove Duplicate Lines only does what a browser can do on its own — it talks to no backend service. So it keeps no history for you and syncs nothing across devices; if you need a record, copy or download the result.
It is also not a substitute for professional judgement. For legal, medical or tax decisions, treat the output as a starting point rather than a final answer.
Frequently Asked Questions
- How do I remove duplicate lines from a list?
- Paste your list into the box, one item per line. Duplicates are removed automatically and the first occurrence stays where it was.
- Does it keep the original order?
- Yes. Only repeats are dropped — the surviving lines keep their original positions.
- Can it ignore capitalisation?
- Turn on "Ignore case" and Apple, apple and APPLE will be treated as the same line.