Remove Duplicate Lines
Remove duplicate lines from any text instantly. Keep first or last occurrence, case-insensitive dedup, sort unique lines. 100% in your browser, no upload, no. It runs entirely in your browser — no signup, no installation, and nothing you paste or drop leaves your device.
Remove Duplicate Lines
Paste any text that contains repeated lines — a list of emails, product names, keywords, or log output — and this tool will clean it up for you in real time. You can keep the first occurrence of each line, keep the last one, ignore differences in capitalization, only remove lines that appear one after another, or sort all unique lines alphabetically. Everything runs locally in your browser, so your text never leaves your device. It is completely free, needs no signup, and works instantly on lists of any size.
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What is Remove Duplicate Lines?
Remove Duplicate Lines is a free online text tool built for writers, editors, students and anyone cleaning up copy. Remove duplicate lines from any text instantly. Keep first or last occurrence, case-insensitive dedup, sort unique lines. 100% in your browser, no upload, no In practice you paste the text with duplicate lines, choose first or last occurrence and whether matching ignores case, and then copy the cleaned list.
Nothing you paste is uploaded: the conversion runs as JavaScript inside your browser tab, so drafts, manuscripts and internal documents stay on your machine.
How to use Remove Duplicate Lines
- Paste the text with duplicate lines.
- Choose first or last occurrence and whether matching ignores case.
- Copy the cleaned list.
Remove Duplicate Lines FAQ
Is Remove Duplicate Lines free to use?
Yes. Remove Duplicate Lines is completely free and needs no account, no trial and no payment details. Every feature on the page is available without limits.
Is my data uploaded anywhere?
No. Remove Duplicate Lines runs entirely in your browser, so the text, file or number you enter never leaves your device.
Does Remove Duplicate Lines work on a phone or tablet?
Yes. It works in any modern browser on desktop, tablet and phone. There is no app to install and no account to create.
How do I use Remove Duplicate Lines?
Paste the text with duplicate lines. Choose first or last occurrence and whether matching ignores case. Copy the cleaned list.