Remove Duplicate Lines
Remove duplicate lines from any text instantly. Options to ignore case, trim whitespace, sort, and show only unique or only duplicate lines. Runs 100% in your browser.
What each mode does
- Remove Duplicates — keeps first occurrence of each line
- Sort Lines — alphabetical, reverse, by length, or numeric
- Remove Empty — strips all blank lines
- Trim Whitespace — removes spaces and tabs at line start/end
- Shuffle — randomly reorders lines (perfect for giveaways, quizzes)
What is the Remove Duplicate Lines?
Remove duplicate lines from any text instantly. Options to ignore case, trim whitespace, sort, and show only unique or only duplicate lines. Runs 100% in your browser.
It runs 100% in your browser — your files never leave your device, no signup is required, and there are no usage limits or watermarks.
How to Use the Remove Duplicate Lines
- Paste, drop, or type your input into the tool above.
- Adjust the options to match what you need.
- Preview the result before copying or downloading.
- Everything is generated on your device — nothing is uploaded.
Why Use Our Remove Duplicate Lines?
- 100% private — files never leave your device.
- No signup, no email, no limits — completely free.
- Works on any device — desktop, tablet, mobile.
- No watermarks, no hidden fees.
Frequently Asked Questions
Is the Remove Duplicate Lines free?
Yes — completely free with no signup, no email, and no usage limits.
Are my files uploaded to a server?
No. Everything runs in your browser using JavaScript. Your files never leave your device.
Do I need to install anything?
No — just open this page in any modern browser (Chrome, Firefox, Safari, Edge).
Does the Remove Duplicate Lines work on mobile?
Yes, on iOS and Android browsers. Very large files are best handled on desktop.
Is there a file size limit?
No hard limits. Files under 100 MB work well on most devices.
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