Remove Duplicate Lines
Paste any list and instantly get unique lines, duplicates only, or a cleaned, sorted version — free and works entirely in your browser.
⭐ Liked Results
How it works
Paste
Paste or type your list of lines in the box above.
Choose Mode
Pick a cleanup mode from the 5 options.
Preview
See the processed result instantly.
Copy
Copy any result with one click.
Why use this tool
5 Cleanup Modes
First-seen unique, case-insensitive unique, duplicates only, sorted unique, and trimmed unique.
Instant Processing
Results update instantly as you type or paste.
One-Click Copy
Copy any result to your clipboard.
Private by Design
Everything runs locally in your browser — nothing is uploaded.
Quick preview
Input
Unique (First Seen)
Unique (Ignore Case)
Duplicates Only
Frequently asked questions
What does this tool do?
It scans a list of lines you paste in and removes duplicates using several different rules, so you always get a clean list back.
Does it ignore letter case?
Yes — the "Unique (Ignore Case)" mode treats "Banana" and "banana" as the same line, while "Unique (First Seen)" treats them as different.
Can I see only the duplicates?
Yes, the "Duplicates Only" card shows lines that appeared more than once, each listed a single time.
Is my data uploaded anywhere?
No, all processing happens locally in your browser. Nothing you paste is sent to a server.
Ready to clean up your list?
Paste your data above and get a duplicate-free list in seconds — free, with no sign-up.
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